养啥啥不活
高尚的生活是受爱激励并由知识导引的生活，没有知识的爱与没有爱的知识，都不可能产生高尚的生活;下面我给大家分享一些高中英语选修七课文知识，希望能够帮助大家，欢迎阅读!
高中英语选修七课文知识1
Ⅰ. 常考单词必背
1.queue n. [C]长队;行列vi. 排队等候
If we had booked a table earlier，we couldn't be standing here in a queue.
如果你早订张桌子的话，我们现在就不会站在这儿排队了。
2.recommend vt. ①推荐;介绍 ②劝告;建议(接从句时常用虚拟语气)
I borrowed the book Sherlock Holmes from the library last week，which my classmates recommended to me.
上周我从图书馆借了本《夏洛克·福尔摩斯》，这是我同学推荐我看的书。
[快速闪记]
(1)recommend sb sth = recommend sth to sb 向某人推荐某物
recommend doing sth 建议(劝告)某人做某事
recommend sb to do sth 劝告某人做……
recommend sb as... 推荐某人当……
recommend that...(should) do... 建议某人……
(2)recommendation n. ①[U]推荐;介绍 ②[C]推荐信; 介绍信 ;劝告
a letter of recommendation 推荐信
3.comfort n. 舒适;安慰 vt. 安慰
The old lady often comforts those who are in trouble.
这位老妇人经常安慰处于困境的人。
[快速闪记]
comfortable adj. 舒服的
comfortably adv. 舒适地
4.substitute n. [C]代用品;代替者 vt. 用……代替
There is no substitute to hard work.
什么都替代不了努力工作。
[快速闪记]
a substitute for...……的代替者
substitute A for B=substitute B with A用A代替B
substitute for 代替
5.requirement n. [C]需要;要求;需要的东西;必要的条件
We have to fit ourselves to the requirements of our jobs.
我们必须适应工作的需要。
[快速闪记]
(1)require sth of sb 向某人要求某物
require+doing/to be done(主语为动作的承受者) 需要做被......
require+to do(主语为动作的发出者) 需要做......
require sb to do sth 要求某人做某事
require that...(should) do要求……(虚拟语气)
(2)to meet/satisfy the requirements 符合/满足必备的条件
6.draft vt. 起草;制定;征募 n. 汇票;草稿;草案
Finally，my thanks go to my tutor，who has offered a lot of suggestions and comments on my paper and polished every page of my draft.
最后，我要感谢我的导师，因为他给我的论文提供了很多建议和评论，修改我的草稿的每一页。
7.acknowledge/?k'n?lId?/ vt. ①承认;确认 ②答谢;向……打招呼
It is widely acknowledged that students should be evaluated in terms of overall quality.
人们普遍认为应该通过综合素质来评价学生。
acknowledgement n. 承认;答谢
in acknowledgement of 为感谢……
8.occupy vt. 占领;占用;使忙碌
He occupied his whole afternoon reading books.
他用了一下午的时间读书。
[快速闪记]
occupation n. [C]&[U] ①占领;占据 ②工作;职业
be occupied with sth 忙于某事
be occupied in doing sth 忙于做某事
9.routine n. [C]&[U] 常规;惯例;例行公事 adj. 例行的;常规的
Thus eating becomes an enjoyment instead of a routine work you have to do every day.
因此，饮食成为一种享受而不是一个每天你必须做的例行工作。
[快速闪记]
a routine report 例行 报告
10.abundant adj. 丰富的;充裕的
We have abundant evidence that cars have a harmful effect on the environment.
我们有充分的证据证明汽车对环境有不良影响。
[快速闪记]
be abundant in (= be rich in) 富有……;……很丰富
abundance n. 大量;充裕
in abundance 丰富;大量
Ⅱ. 高频 短语 必会
1.adjust to 适应;调节
2.keep it up 保持优秀成绩;继续干下去
[快速闪记]
keep an eye on 照看;留意;密切注视
keep a record (of) 登记;记录
keep back 保留;阻止
keep fit 保持健康
keep...from doing 阻止……做
keep...in mind 记住;想着
keep off 避开;防止;挡住
keep on 继续(干)
keep...out (of...) 遮挡;使不进入
keep to one's promise 信守诺言
keep up 保持;继续(某活动);不使(斗志)低落;维持
keep up with 跟上;不落在后面
keep (a) watch 注意;警惕;提防
3.fit in 相适应;相融合
4.as far as one is concerned 就……而言
5.day in and day out 日复一日
6.out of the question 不可能的;不值得讨论的
out of question 毫无疑问
Ⅲ. 写作句式必学
1.It was the first time she had ever left her motherland.
这是她第一次离开自己的祖国。
2.Studying here is quite different from studying in China.
在这里学习跟在中国学习相当不同。
3.It's not just study that's difficult.
困难不仅仅只是学习方面。
4.When I miss my family，it's great comfort to have a substitute family to be with.
当我想家的时候，房东家就是我家的替身，和他们在一起给了我很大的安慰。
5.Besides，as far as he was concerned，what other people thought was not the most important thing.
此外，他认为，别人想什么并不是最重要的事情。
6.I have been so occupied with work that I haven't had time for social activities.
我一直忙于学习，以至于我没有时间去参与社会活动。
高中英语选修七课文知识2
Ⅰ. 常考单词必背
1.concept n. 观念;概念
2.relevant adj. 有关的;贴切的;恰当的
It is a great honour for me to tell you some information relevant to the local life.我很荣幸告诉你一些和当地生活相关的信息。
When I am faced with a difficulty，I usually choose to refer to relevant learning materials or Web pages.当我面对困难时，我常常选择参考相关学习资料或网络。
3.adjust/?'d??st/ vt.&vi. ①(使)适应;(使)校准;(使)调整 ②整理;使有条理
She carefully adjusted her clothes and her hair before going out.她出门之前仔细地整了整衣服和头发。
[快速闪记]adjust(oneself) to (doing) sth (使某人)适应(做)某事adjustment/?'d??stm?nt/ n.[C]&[U]调整;调节make an adjustment/adjustments to 调整……(以适应……)adjustable adj. 可调节的;可调整的
4.participate vi. (与in连用)参与;参加
Use an effective teaching style that allows people to participate in their learning.运用一种有效的培训风格让人们参与到学习中去。
5.otherwise conj. 否则;不然 adv. 用别的 方法 ;其他方面
Otherwise，you may have problems such as red eyes，pain in the eyes，or a more serious condition.否则的话，你可能会有这样的问题，像红眼、眼痛或更严重的情形。
6.privilege n. 特权;荣幸
Having been born to privilege in old Hollywood，she was carrying on a family tradition by acting.她出身于过去好莱坞的名门，继承了当演员的家族传统。
7.donate v. 捐赠;捐献
She is willing to donate money to a worthy cause.她愿为高尚的事业捐款。
[快速闪记](1)donate...to... 把……捐给……同义短语：subscribe to，donate to，contribute to等。(2)donation n. 捐款;捐赠donor n. 捐赠者;输血者
8.voluntary adj. 自愿的;志愿的;无偿的
We run the meals-on-wheels service on a voluntary basis.我们根据自愿的原则，开展上门送饭的服务。
9.distribute vt. 分配;散布;分开distribution n. 分配;分发
10.operate vi. ①操作;运转 ②起作用;奏效 ③(常与on连用)动手术;开刀 vt. ①操作;开动 ②经营③对……动手术
For most people，it's almost impossible to operate a computer without a mouse...对大多数人而言，没有鼠标几乎无法操作电脑……
[快速闪记]operation n. [C] &[U]①操作;工作;运转 ②手术 ③作战(行动)operator n. [C]话务员;操作员;经营者;企业主
Ⅱ. 高频短语必会
1.hear from 接到……来信
2.(be) dying to 极想;渴望
3.the other day 不久前的一天
4.dry out (使浸水之物等) 完全变干;干透
5.dry up (指河流、井等) 干涸
6.in need 在困难中;在危急中
Ⅲ. 写作句式必学
1.Thanks for your letter，which took a fortnight to arrive.谢谢你的来信，这封信两星期才到。
2.There is no electricity or water and even no textbook either.这儿没有电，也没有水，甚至连课本也没有。
3.Once the fire was going，he laid stones on it.一旦火着起来后，他往火里扔几块石头。
高中英语选修七课文知识3
Ⅰ. 常考单词必背
1.annual adj. 每年的;年度的n. 年刊;年鉴
Our school's annual sports day took place yesterday in 30-degree heat.昨天，学校一年一度的运动会在30度的高温下举行了。
2.witness vt. 目击;当场见到n. 目击者;证人
The driving we have witnessed was beyond belief.我们亲眼目睹的驾车场面令人难以置信。
3.opposite adj. (无比较级) ①对面的;相对的②(截然)相反的;对立的n. [C] 反义词 ;对立面prep.在……的对面
We have opposite views on politics.我们的政治观点不同。
She observed a man walking on the opposite side of the way.她注意到一个人在路的对面走着。
4.pause n. [C]中止;停顿;暂停vi. 中止;停顿;暂停
She talked for an hour and a half without pause.她连续说了一个半小时，中间没有停歇。
After you introduce the topic，pause to hear what your partner says.在你引入了这个话题后，停下来听听你的伙伴怎么说。
5.flee(fled，fled) vt. 逃离;逃避vi. 逃走;逃避
Many of the people have fled to the mountains to escape the floods.许多人为躲避洪水都逃到了山上。
The smile fled from his face.他脸上的笑容倾刻时消失了。
6.drag vt. 拖拽;吃力地往前拉vi.落后;缓慢前进 n. 拖，拉; 累赘
We all have a good laugh，so the time never drags.我们经常笑得很开心，所以时间过得快。
She dragged herself out of bed，still half asleep.她挣扎着起了床，还是睡眼惺忪。
7.urge vt. 催促;极力主张;驱策
They urged me to eat (into eating) the strange food.他们怂恿我吃那种奇怪的食物。
He urged that we (should) take such steps.他极力主张我们采取这些 措施 。
8.abandon/?'b?nd?n/ vt. 放弃;遗弃 n. [U]放任;狂放
Don't abandon yourself to despair.不要自暴自弃。
[快速闪记](1)abandon...to... 把……遗弃给……with abandon 放肆地(2)abandoned adj. 被抛弃的;报废的(3)abandon oneself to(to为介词) 沉溺于;纵情
同义短语：apply oneself to，devote oneself to，resign oneself to等。
9.target n. 目标;靶子;受批评的对象
I aimed the gun carefully at the target.我小心地用枪瞄准了目标。
10.sharp adj. ①锋利的;尖的 ②敏锐的;机警的 ③尖刻的;严厉的
Mary，who has sharp eyes，can see through others.玛丽，目光敏锐，能看透别人。
[快速闪记]sharpen vt. 磨快;使敏捷;使尖锐sharpener n. [C]磨具;卷笔刀
Ⅱ. 高频短语必会
1.help(...) out 帮助(某人)摆脱困境或危险
cannot help doing sth 禁不住做某事
2.be/become aware of 对……知道、明白;意识到……
3.upside down 上下翻转
4.(be)scared to death吓死了
Ⅲ. 写作句式必学
1.As I was sorting out my accommodation，I heard a loud noise coming from the bay.正在我找住处的时候，我听到从海湾那边传来一阵喧闹声。
2.This was the call that announced there was about to be a whale hunt.这是宣告捕鲸行动马上就要开始的呼声。
3.Being badly wounded，the whale soon died.由于严重受伤，鲸鱼很快就死了。
高中英语选修七课文知识4
Ⅰ. 常考单词必背
1.desire n.渴望;愿望;欲望v.渴望;向往;要求
We all desire happiness and health.
我们都想得到幸福和健康。
[快速闪记]
(1)have a strong desire to do sth 迫切想要做某事
(2)have a strong desire for sth 急于想得到某物
desire to do sth 渴望做某事
desire sb to do sth 想要某人做某事
desire that主语+should+动词原形，should可以省略。
(3)desirable adj. 令人满意的
desired adj. 渴望的;想得到的
2.alarm n.警报;惊恐vt. 使警觉;使惊恐;惊动
I forgot to set my alarm and I overslept.
我忘了定闹钟，结果睡过了头。
They were alarmed by a sudden attack.
突然袭击使他们大为惊恐。
3.sympathy n.同情
I have a lot of sympathy for him;he brought up his two children on his own.
我非常同情他，他独自把两个孩子养大。
[快速闪记]
(1)feel/have great sympathy for sb 对某人深感同情
with sympathy 同情地
(2)sympathetic adj. 同情的;支持的
sympathize/sympathise vi. ①同情;怜悯 ②体谅;赞同
4.favo(u)r n.[U]喜爱;恩惠;赞同vt. 喜爱;支持;赞成
The idea is beginning to gain widespread favour.
这种意见开始赢得广泛赞同。
[快速闪记]
(1)in favour of 赞同;支持
in sb 's favour 对某人有利
do sb a favour/do a favour for sb 帮某人一个忙
ask sb a favour=ask a favour of sb 请某人帮忙
(2)favourable adj. 赞同的;有利的
favourite adj.&n.特别喜爱的(东西)
5.pile n.[C] ①一堆②大量 vt.&vi. 堆积;积聚
The leaves had been swept into huge piles.
树叶被扫成了一大堆一大堆的。
[快速闪记]
a pile of 一堆
piles of 一堆堆的
pile up 堆积
6.absurd adj. 荒谬的;可笑的
He felt it was absurd to be filled with hatred for someone he had never met.
他觉得对从未见过的人充满仇恨可真是荒谬。
7. accompany vt. ①陪伴;伴随 ②伴随发生(with) ③伴奏(+on/at)
Friends，in this time of happiness，joy and goodwill to accompany you! 朋友，在这幸福的时光里，让快乐和美好永远陪伴着你!
[快速闪记]
(1)accompany sb to someplace 陪伴某人去某地
accompany sb on/at 用……给某人伴奏
accompany...with/by 与……同时存在或发生
(2)keep sb company 陪伴某人
in company with 与……一起
8.declare v.宣布(声明);申报;声明
He declared that he would fight for his right.
他宣称要为他的权利而斗争。
[快速闪记]
declaration n.宣言，布告，公告，声明
declare against 声明反对
declare sth to sb/sth 向……表明自己的观点
declare...open/close 宣布……开始/结束
declared war on 向……宣战
9.talent n.天才;特殊能力
Which of them has more musical talent is open to debate.
他们之中谁更有音乐天赋还未有定论。
10.obey vt.&vi.服从;听从;遵守
disobey v.不服从;违抗
A robot must obey the orders given to it by human beings.
机器人必须遵守人类的指令。
obey the rules 遵守规则
Ⅱ. 高频短语必会
1.test out 实验;考验
2.ring up 给……打电话
3.turn around 转身;翻转
4.set aside 将……放在一边;为……节省或保留
5.in all 总共;总计
6.be bound to 一定做……
Ⅲ. 写作句式必学
1.It was disturbing and frightening that he looked so human.机器人如此通人性，这使她觉得心烦和害怕。
2.As a favour Tony promised to help Claire make herself smarter and her home more elegant.
作为一个恩惠，托尼答应帮助克莱尔，使她更漂亮，使她的家更高雅。
3.She fell off a ladder and even though Tony was in the next room，he managed to catch her in time.
她从梯子上掉下来，尽管托尼在隔壁房间里，他还是及时(赶过来)把她接住了。
高中英语选修七课文知识5
Ⅰ. 常考单词必背
1.ambition n.雄心;野心ambitious adj. 有雄心的;有野心的
His only fault is that he lacks ambition.他唯一的不足是志向短小。
2.beneficial adj. 有益的;受益的benefit vt. 有益于 vi.受益;得到好处 n.好处;益处
Your medicine has benefited me much.你的药对我大有益处。
[快速闪记]benefit from 从……中受益be of benefit to 对……有益(=be beneficial to)for the benefit of 为……(的利益)
3.clumsy adj. 笨拙的
4.adapt vt.&vi. ①(使)适应②改编;改写
I suggested he should adapt himself to his new conditions.我认为他应该使自己适应新的情况。
[快速闪记](1)adapt(oneself) to(doing) sth (使某人)适应(做)某事adapt...from... 根据……改编……be adapted for 为……而改编(2)adaptation n.[C] & [U] 适应;改编;改写本;改编的作品
5.absence n.①[C] & [U]缺席;不在②[U]缺乏
A stranger brought you this letter during your absence.你不在时，一个陌生人给你捎来了这封信。
[快速闪记](1)absence of mind 心不在焉in sb's absence 某人不在时in the absence of sth 缺乏某物(2)absent adj. ①缺席的;不在的 ②缺乏的be absent from 缺席……absent-minded adj. 心不在焉的
6.resign vi. 辞职;放弃vt. 辞去;放弃;把……交付(给)
All the employees resign because the employer is too unreasonable.因为老板太不讲理，雇员全体辞职。She resigned her baby to the care of her neighbour.她把婴儿托付给邻居照管。resign from a job 辞职
7.adequate adj. ①足够的②恰当的;胜任的
[快速闪记]be adequate for 足够……be adequate to do...... 胜任做……;足以做……
8.access n.①接近/进入的方法;到达/进入的权利②通道;入口
Only a few people have access to the full facts of the incident.只有几个人可以知道事件的全部真相。
[快速闪记]have/gain/get/obtain access to 可接近;可进入;可使用accessible/?k'ses?bl/ adj. 容易取得的;容易接近的;容易受影响的be accessible to 能接近……，可使用……
9.approval n.[C] & [U]赞成;同意;批准
Do the plans meet with your approval?这些计划你赞成吗?
[快速闪记](1)approve vt. 赞成;同意approve of sb's doing sth 同意某人做某事(2)without approval 未经许可give one's approval to 同意;批准
10.profit n.[C] & [U]利润;收益;利益;益处vt.&vi.有益(于);有利(于)
A company whose profits from home markets are declining may seek opportunities abroad.一家在国内市场利润下降的公司可能会去国外谋求机会。It will profit us nothing to do that.做那事对我们没有任何好处。
Ⅱ. 高频短语必会
1.in other words 换句话说
[快速闪记]have a word with sb 与某人谈话keep/break one's word 遵守诺言/食言;失信beyond words 无法用语言表达
2.cut out 切下，裁剪
[快速闪记]cut across 抄近路cut away 切，剪，去掉cut down 减少，砍倒cut in 插嘴，插队cut off 切断，阻碍cut up 切碎，使悲痛，使伤心
3.out of breath 上气不接下气
Reaching the top of the tower，he was out of breath.到了塔顶他就上气不接下气了。
catch/hold one's breath 屏息;憋住气lose one's breath 喘不过气
4.all in all 总而言之5.sit around 闲坐着6.in many ways 在很多方面7.as well as 也;和8.make fun of 取笑9.never mind 不必担心10.meet with 遇到;经历;会晤
Ⅲ. 写作句式必学
1.Every time I returned after an absence，I felt stupid because I was behind the others.每次请过假之后，我觉得自己笨，因为比别人落后了一些。
2.Sometimes，too，I was too weak to go to school so my education suffered.有时，我的身体也很虚弱，以至于不能去上学，因此我的学习受到了影响。
3.Just accept them for who they are，and give them encouragement to live as rich and full a life as you do.接受他们，给予他们鼓励，让他们能像你一样过得丰富多彩，充实美满。
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爆米花也是花
如果说阻止他人获取知识就是扼杀知识，那么对扼杀知识习以为常，就会导致对杀害人习以为常——因为确切而言，人就是知识;还会导致对人的缺失习以为常。下面我给大家分享一些高中英语选修七知识点，希望能够帮助大家，欢迎阅读!
高中英语选修七知识点1
Unit1：
1. disability n.无能;残疾disabled adj.伤残的able adj.能干的;能够的
2. ambition n.野心，雄心ambitious adj.有雄心的，野心勃勃的
3.beneficial adj.有益的benefit v.&n.受益;利益，好处
4. independent adj.独立的independence n.独立depend v.依靠，依赖
5.encouragement n.鼓励encourage v.鼓励courage n.勇气，精神
单词：
1.ambition (n.) 雄心
2.beneficial (adj.) 有益的
3.adapt (v.) 使适应;改编
4.conduct (n.) 行为 (v.) 指挥
5.resign (v.) 辞职
6.companion (n..) 同伴
7.access n. (接近的) 方法 ;通路;可接近性
8.suitable adj.适合的, 适当的;
9.annoy vt. 使生气，使烦恼; 招惹; 妨碍
10.adequate adj.适当的, 足够的
重点词组in other words 换句话说 cut out 切掉,删掉 out of breath 上气不接下气
sit around 闲坐着 make fun of 取笑 all the best一切顺利
as well as 也, 又; 和……一样好
重点词汇
1. ambition (n.) 雄心
ambitious adj. 志向远大的; 有雄心壮志的;有野心的
2. beneficial (adj.) 有益的
benefit v. &n.有助于;受益;利益，好处
be beneficial to sth./sb.对……有益
be of benefit to对……有益
for the benefit of为了……(的利益)
benefit from从……中受益
3. adapt (v.) 使适应;改编
adapt (oneself) to sth.适应某物
adapt…to…使……适应……
adapt sth. for sth. from sth.根据某事将……改编成……
be adapted from… 由……改编
4. conduct (n.) 行为 (v.) 指挥
conductor n. 领导者, 经理,
a bad conduct恶劣行为
under the conduct of在...指导[管理]下
5. resign (v.) 辞职;委托, 把...交托给(to, into)
resign one's position (as secretary) 辞去(秘书)职务
resign office辞职
resign oneself to听任(某种影响); 只好(做某事)
resign oneself to one's fate听天由命
resign ... to... 把... 托付给
6. companion (n..) 同伴
make companions of 与...作伴， 与...为友
companions in arms战友
a faithful companion忠实伴侣
7. access n. (接近的)方法;通路;可接近性
accessible adj. 易接近的, 可到达的,
accessible to(prep.)
8. suitable adj.适合的, 适当的;
suit v. 合适, 适合, 相配,
unsuitable adj. 不适合的, 不相称的
be suitable for (doing) sth./sb. 很适合(做)……
9. annoy vt. 使生气，使烦恼; 招惹; 妨碍
be annoyed at/by sth.因为某事而感到困扰
get /be annoyed with sb.生某人的气
annoying 令人恼火的
annoyed 恼怒的;烦恼的
10. adequate adj.适当的, 足够的; 差强人意的
高中英语选修七知识点2
Unit2:不定式
1.不定式的被动形式
当不定式与逻辑主语之间是被动关系时 即不定式的逻辑主语是不定式所表示动作的承受者不定式一般要用被动形式。其被动式可以分为两种一般式和完成式。
(1) 一般式to be done表示不定式动作在谓语动词之后或者同时发生。
It is a great honor to be invited to speak here. 很荣幸被邀请在这里讲话。
The novel is said to be published next month. 据说这本小说下月要出版。
(2) 完成式 to have been done 表示不定式动作发生在谓语动词之前。
The book is said to have been translated into six languages.
这本书据说已经被翻译成六种语言。
The boss preferred to have been given more work to do.
老板宁愿被分给更多的工作做。
被动 一般式 to be done 完成式 to have been done
2.不定式被动形式的作用
(1)作主语
It's an honor to be invited to the ceremony.
很荣幸被邀请赴宴。
It's a pity to be kept in the house in such fine weather.
在这样好的天气被关在家里真是遗憾。
(2)作表语
The letter is to be sent by airmail. 这封信笺要空邮。
(3) 作宾语
She didn't like to be treated as a child.
她不喜欢被当成孩子。
The boy asked to be given an opportunity to try again.
那男孩要求给他再试一次的机会。
(4)作宾语补足语
I'd like my bedroom to be cleaned. 我想整理一下我的卧室。
(5)作定语
He was the last one to be asked to speak at the meeting.
他是最后一个在会上被邀请发言的人。
(6)作状语
His mother left the small village never to be seen again.
他母亲离开了那个小山村，再也没有人见过她。
3.不定式有些要注意的地方
(1) 感官动词和一些使役动词的不定式的主动形式要省去to但在变成被动语态后需要加上to能这样用的动词或动词词组有make have let see hear notice listen to watch等。
如：We often see him act like that. He is often seen to act like that. 我们常常看到他那样做。
(2)在can't help buthave nothing to do but结构中介词but后的不定式省去to。
如：I can't_help_but suspect his motive. 我不禁怀疑起他的动机。
I have nothing to do but watch TV. 我没什么事情可做除了看电视。
(3)不定式有时要用主动形式表示被动意义
①形容词以及含有形容词的名词后的不定式，一般用主动形式表示被动意义 其中形容词常见的有easy difficult important impossible等。
如：The work is impossible to finish in two days. 工作不可能两天之内完成。
English is not so easy to learn. 英语并不好学。
① 一些固定用法 如“挨骂 受责备 受批评” 用be to blame “(东西等)出租”用to let。
V-ing 的用法：
1.作主语
Swimming is good for health.
2. 作表语 Teaching is learning.教学相长.
注意：1)动名词和不定式都可以作主语，动名词作主语表示一般或抽象的多次性行为，不定式作主语往往表示具体的或一次性的动作。
如：
Playing with fire is dangerous. (泛指玩火)
To play with fire will be dangerous.(指一具体动作)
2). V-ing形式和不定式都要有对称性;当主语是不定式时，表语也用不定式;反之，当主语是 V-ing 形式时，表语也用 V-ing 形式。
To see is to believe.= Seeing is believing.
3). It’s no use (good) doing sth
It’s a waste of time doing sth
it 作形式主语, 只用V-ing,不用不定式。
※ It is + adj. + (for sb ) to do sth
It is no use crying over spilt milk.覆水难收。
It is a waste of time talking (talk) to him .
It is important for me to learn (learn) English .
3.作宾语 V-ing 形式既可作动词的宾语, 也可作介词的宾语。
We would appreciate hearing from you.我们会珍惜你的来信。
高中英语选修七知识点3
Unit4：定语从句
1. 关系代词 that, which (物) that, who, whom(人)whose(人和物)
①关系代词在从句做主语，宾语，表语。当做宾语时，可以省略。
A plane is a machine that can fly.(that做主语，先行词是物)
The book (which) I gave you was worth $10.(which先行词是物，在从句中作宾语可省，) She is the pop star (that) I want to see very much.(that先行词是人，在从句中做宾语可省)
②who在从句中多做主语，whom只能做宾语，(介词和动词后)
Do you know the man who is talking with your mother?(who在从句中做主语，先行词是人)
The boy (whom) she loved died in the war.(whom在从句中做宾语，可省)
③ whose先行词即可是人也可是物。
I like those books whose topics are about history. The boy whose father works abroad is my deskmate.
2. 关系副词
where 在从句中作地点状语 when 在从句中作时间状语 why 在从句中作原因状语 I will never forget the day when we met there.
This is the house where I was born.
I can’t imagine the reason why he turned down my offer.
三、介词/介词 短语 +关系代词(which, whom)
Mr. Smith is the person with whom I am working. This is the hotel in which you will stay.
关系副词when, where, why的含义相当于"介词+ which"结构，因此常常和"介词+ which"结构交替使用。
例如：There are occasions when (on which) one must yield. 任何人都有不得不屈服的时候。
Beijing is the place where(in which) I was born. 北京是我的出生地。
Is this the reason why (for which) he refused our offer? 这就是他拒绝我们帮助他的理由吗?
四、 限制性定语从句和非限制性定语从句
1. 形式不同
2. 作用不同
限定性定语从句用于对先行词的意义进行修饰、限制和识别，如果去掉，就会造成句意不完整或概念不清;而非限定性定语从句用于对先行词起补充说明作用，如果省略，句意仍然清楚、完整：
3. 翻译不同 He is the man whose car was stolen. 他就是汽车被窃的那个人。 I’ve invited Jim, who lives in the next flat. 我请了吉姆，他就住在隔壁。
4. 先行词不同
五、 as引导的定语从句 as可以引导限制性和非限制性定语从句，在从句中做主语，宾语和表语。翻译成“像?一样”或“像” such?as 像??一样，之类 the same?as 和??一样
He is such a clever boy as everyone likes.(as在从从句中做宾语，)
That’s the same tool as I used last week.
六、 as引导的定语从句和which的区别
①which 限制性非限制性位于句后修饰整句或先行词
Beijing, which is the capital of China, is a very beautiful city.
As is well known, he is a famous film star in the 1980s.
② as 多 和 被 动 语 态 连 用 ， be known, be said, be reported, be announced, be expected等
③当非限制性定语从句是否定时，只能用which。
He came here very late, which was unexpected.
七、 特殊情况
只能用that的情况：
1.先行词为all, everything, anything, nothing, little, much,等不定代词时
2.先行词被all, any, every, each, much, little, no, some, few等修饰时
3.先行词有形容词最高级修饰时
4.先行词有序数词修饰时
5.先行词既指人又指物时
6.先行词被the only, the very修饰时
7.句中已经有who或which时，为了避免重复时
例如：
1.He told me everything that he knows.
2.All the books that you offered has been given out.
3.This is the best film that I have ever read.
4.We talked about the persons and things that we remembered.
5.He is the only man that I want to see.
6.Who is the man that is making a speech?
二、 只能用which不能用that的情况:
1. 非限制性定语从句
2. 介词+which
3. the way 做先行词时，定语从句可由that, in which 引导或不用引导词。
4. 当先行词是point, situation, stage等时，引导词用where.
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