我想说真话
1. 名词性从句（包括主语从句，宾语从句，表语从句，同位语从句）2. 定语从句3. 状语从句（包括时间、条件、结果、目的、原因、让步、地点、方式等）。1）主语从句用作主语，如：That the earth is round is true. 地球是圆的是真实的。2）宾语从句用作宾语。如：Do you know where he lives?3）表语从句用作表语，如：My opinion is that you should not go alone. 我的意见是你不应单独前往。4）同位语从句用于解释说明前面的名词。如：The fact that the earth is round is true. 地球是圆的的事实是真实的。（that从句用于解释说明the fact）5）定语从句相当于一个形容词，用于修饰前面的名词。如：The student who answered the question was John. 回答问题的学生是John.6）状语从句相当于一个副词，如：When it rains, I usually go to school by bus. 天下雨时，我通常坐公共汽车上学。（时间状语）
Joanrry琼
请比较下面两个句子:1.My brother gave me a computer2.She asked me to go shopping with her.在1句中,me 与 a computer 是双宾语. 两词之间没有什么关联 .只表达给的对象与物.在2句中me与 to go shopping 形成逻辑意义上的主谓关系.所以 to go shopping with her 这一不定式短语补充说明宾语me 的动作行为 而不是主语she 的动作.故称为宾语补足语. 只简略回答,若想了解更多内容,可参阅语法书.祝你进步！
坚吃不懈1208
主语从句(Subject Clause)定义:如果一个句子在复合句中充当一个主语,那么这个句子就是主语从句.第一部分：常规主语从句，即句子在复合句中充当一个主语（1）That he finished writing the composition in such a short time surprised us all.（2）Whether we will go for an outing tomorrow remains unknown.（3）Who will be our monitor has't been decided yet.（4） Whom we must study for is a question of great importance.（5）What caused the accident remains unknown.（6）Whatever you did is right.（7）Whose watch was lost is unknown.（8）What we need is time.（9）What we need are good doctors.小结:（1)引导主语从句连词有that,whether,who,what,whatever等（2)连词位于句首不能省略（3)主语从句大多数情况下视为单三,但也有例外,如例9第二部分：为了防止句子头重脚轻，通常把形式主语it放在主语位置，真正主语搁置于句末（1）It is certain that he will win the match.（2）It is true that he has made a very important discovery in chemistry.（3）It is very likely that they will hold a meeting.（4）It is strange that he should do that.（5）It is important that we all should attend the meeting.（6）It is strange that the man should have stuck to his silly ideas.（7）It is a pity that we won't be able to go to the south to spend our summer vacation.（8）It is still a mystery what caused the accident.（9）It is said that he has gone to shanghai.(=He is said to have gone to shanghai)（10）It is known to all that the gun powder was first invented by the Chinese.（11）It is suggested that the work should be done with great care.（12）It seems that he has seen the film.(=He seems to have seen the film)（13）It happened that the two cheats were there. (=The two cheats happened to be there)小结:（1)以that 引出的主语从句,常以形式主语it引导. It is +形容词/名词/某些动词ed + that 从句.（2) 在有些that从句中要用虚拟语气 (should+do/should+have done)例句4,5,6,11.http://baike.baidu.com/view/100914.htm
心海若冰
主语从句就是一个句子作主语~如:(That Mary married Jack) surprised everyone 括号内容为主语从句,主句的谓语是surprise~~宾语补足语如:to have my hair cut 而cut就是宾语我的头发的补足语
密果儿小雨
主语从句(Subject Clause) 定义:如果一个句子在复合句中充当一个主语,那么这个句子就是主语从句.It 作形式主语和it引导强调句的比较 It 作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。而it引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that。被强调部分指人是也可用who/whom。例如： It is a pity that you didn’t go to see the film.
小殊哥哥
一、定义：从句（SubordinateClause）是复合句中不能独立成句，但具有主语部分和谓语部分，由that、who、whom，when，why，where。how，which等引导词（connective）引导的非主句部分。二、分类：从句不能单独成句，但它也有主语部分和谓语部分，就像一个句子一样。所不同在于，从句须由一个关联词（connective）引导。根据引导从句为主不同大概可分为：主语从句、表语从句、宾语从句、同位语从句、定语从句和状语从句6类。前四类由于主语从句、表语从句、宾语从句及同位语从句在句子的功用相当于名词，所以通称名词性从句；定语从句功能相当于形容词，称为形容词性从句；而状语从句功能相当于副词，称为副词性从句。状语从句还可以分为条件状语从句、原因状语从句、地点状语从句和时间状语从句。三、按分类具体描述1.主语从句（SubjectClause）：用作主语的从句叫主语从句。引导主语从句的关联词有从属连词、疑问代词、疑问副词、缩合连接代词、缩合连接副词等。2.表语从句（PredicativeClause）：用作表语的从句叫表语从句。引导表语从句的关联词与引导主语从句的关联词大都一样。3.宾语从句（ObjectClause）：在句子中起宾语作用的从句叫做宾语从句.宾语从句分为三类:动词的宾语从句,介词的宾语从句和形容词的宾语从句。4.同位语从句是名词性从句(主语从句、表语从句、宾语从句、同位语从句)中的主要从句之一，从句作同位语表示与之同位的名词(短语)的实际内容，它的作用相当于名词，对前面的名词(短语)加以补充说明或进一步解释，相当于一个表语从句，它们之间的关系是同位关系，即主表关系。5.定语从句是由关系代词或关系副词引导的从句，其作用是作定语修饰主句的某个名词性成分，相当于形容词，所以又称为形容词性从句，一般紧跟在它所修饰的先行词后面。6.状语从句可分为：(1)时间状语从句：(adverbialclauseoftime)(2)地点状语从句：(adverbialclauseofplace)(3)原因状语从句：(adverbialclauseofcause)(4)条件状语从句：(adverbialclauseofcondition)(5)目的状语从句：(adverbialclauseofpurpose)(6)让步状语从句：(adverbialclauseofconcession)(7)比较状语从句：(adverbialclauseofcomparison)(8)方式状语从句：(adverbialclauseofmanner)(9)结果状语从句：(adverbialclauseofresult)
优质英语培训问答知识库
