8luckymore8
连词分类：
1、并列连词：是指连接对等的词、词组和句子，而不是连接主句与从句的连词，如：and, both…and, neither…nor, not only…but also, as well as, but, however, while(而),
still, yet, or, either…or, otherwise, so, for, therefore, thus, accordingly, consequently, hence, then,等。
2．从属连词：指连接主句与从句的连词，如：that, whether, if, before, after, as , as soon as, once, since, ever since, till, until, when, whenever,while, because, since, now that(既然), so…that, such…that, so that, in order that, as if,
as though, though, although, even though, even ifno matter who/whoever/…，unless, as/so long as, in case(以防), lest(惟恐), provided, providing, （如果）supposed,
supposing,（假使） 等。二、代词的分类1. 关系代词a) 有who, whom, whose, as, that和which, 是用来引起定语从句的。who, whom代表人，在从句中作主语时用who, 作宾语时用whom：There is a girl who wants to see you. 有一个姑娘想见你。
He is the man whom you asked to see. 他就是你要求见的人。whose表示“他(她)的”，在从句中作定语：Do you know the girl whose painting won the first prize? 你认识那个作品赢得头奖的姑娘吗？
这些关系代词，一方面引起定语从句，修饰前面的那个名词，一方面在从句中担任一个成分。(who作主语，whom作宾语，whose作定语。)b) which代表事物，在从句中可以作主语或宾语：还可以代替整个句子；
He told us a story which was very interesting. 他给我们讲了一个非常有趣的故事。This is the book which I bought. 这就是我买的那本书。
that也可代表事物，在从句中作宾语：Have you got everything that you need? 你需要的东西都有吗？在从句中作宾语的关系代词，有时可以省略：That’s the book I bought. 这就是我买的书。
He is always late for school, which makes his teacher very angry.c) 关系代词as : As is known to all, the earth is round. The earth is round, as is known to all.
关于关系代词详见定语从句。2. 连接代词指引起从句的疑问代词，可用用来引起主语从句(a)、宾语从句(b)和表语从句(c)：a. Who is to be sent there hasn’t been decided. 派谁去还没决定。b. I don’t know who did it. 我不知道这是谁干的。
c. The question is what we should do next. 问题是下一步我们该怎么办。what可有特殊意义，表示the thing which(…的东西)，可作主语(a)、宾语(b)和表语(c)：a. What you need is more practice. 你需要的是更多练习。
b. Show me what you bought. 把你买的东西给我看看。c. That’s what I heard. 这是我听到的情况。这可以称作关系代词型的what。希望能帮到您，谢谢采纳!
陳奕婷3144
并列连词的用法
1. 表示转折关系的并列连词。这类连词主要有 but, yet 等。如：
Someone borrowed my pen, but I don’t remember who. 有人借了我的钢笔，但我不记得是谁了。
He said he was our friend, yet he wouldn’t help us. 他说他是我们的朋友，但却不肯帮助我们。
2. 表示因果关系的并列连词。这类连词主要有 for, so 等。如：
The child had a bad cough, so his mother took him to the doctor. 这孩子咳得很利害，所以他妈妈带他去看医生。
You are supposed to get rid of carelessness, for it often leads to serious errors. 你们一定要克服粗枝大叶，因为粗枝大叶常常引起严重的错误。
注意：for表示结果通常不能放句首，也不能单独使用。
3. 表示并列关系的并列连词。这类连词主要有 and , or , either…or , neither…nor , not only…but (also) , both…and , as well as 等。如：
He didn’t go and she didn’t go either. 他没去，她也没去。
The weather is mild today; it is neither hot nor cold. 今天天气很温暖，不冷也不热。
Both New York and London have traffic problems. 纽约和伦敦都存在交通问题。
It is important for you as well as for me. 这对你和对我都很重要。
People who are either under age or over age may not join the army. 年龄不到或者超龄的人都不得参军。
从属连词的用法
1. 引导时间状语从句的从属连词
(1) 表示“当…时候”或“每当”的时间连词。主要的 when, while, as, whenever。如：
Don’t talk while you’re eating. 吃饭时不要说话。
Vegetables are best when they are fresh. 蔬菜新鲜时最好吃。
He came just as I was leaving. 我正要走时他来了。
(2) 表示“在…之前(或之后)”的时间连词。主要的有before, after。如：
Try to finish your work before you leave. 离开前设法把工作做完。
After we have finished tea, we will sit on the grass. 喝完茶之后我们将坐在草地上。
(3) 表示“自从”或“直到”的时间连词。主要的有since, until, till。如：
She’s been playing tennis since she was eight. 她从八岁起就打网球了。
Hold on until I fetch help. 坚持一下，等我找人来帮忙。
Never trouble trouble till trouble troubles you. (谚)不要无事惹事。(from www.yygrammar.com)
(4) 表示“一…就”的时间连词。主要的有as soon as, the moment, the minute, the second, the instant, immediately, directly, instantly, once, no sooner…than, hardly…when等。如：
I’ll let you know as soon as I hear from her. 我一接她的`信就通知你。
The moment I have finished I’ll give you a call. 我一干完就给你打电话。
I came immediately I heard the news. 我一听到这个消息，马上就来了。
Once you begin you must continue. 你一旦开始, 便不可停下来。
(5) 表示“上次”、“下次”、“每次”等的时间连词。主要的有every time(每次)，each time(每次)，(the) next time(下次)，any time(随时)，(the) last time(上次)，the first time(第一次)。如：
I’ll tell him about it (the) next time I see him. 我下一次见到他时，我就把这个情况告诉他。
We lose a few skin cells every time we wash our hands. 每当我们洗手的时候，我们都要损失一些皮肤细胞。
You can call me any time you want to. 你随时都可以给我打电话。
注意：every time, each time, any time前不用冠词，(the) next time, (the) last time中的冠词可以省略，而the first time中的冠词通常不能省略。
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