高中英语从句大全一．名词性从句起名词性作用的从句叫名词性从句英语当中其名词性作用的成分有主语，宾语，表语，同位语，当这些成分有一个句子来代替就构成了名词从句，主要有主语从句，宾语从句，表语从句，同位语从句。
1.表语从句1.定义：用作表语的从句叫做表语从句。
（be动词,四“变得”：become, get,turn，go；感官动词look,, smell,sound，taste，feel；及grow, turn out，appear，keep等）引导表语从句的词有从属连词that、whether、as though(if)；关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever 等；关系副词when, where, why, how, however, whenever, wherever等。
可以接表语从句的连系动词由be, look, remain, seem等。
The trouble is that we are short of money.That is why stone walls are used instead of fences around New England fields.At that time, it seemed as if I couldn't think of the right word anyhow2、由从属连词that，whether引导的表语从句。
that在引导表语从句时无词义，在口语中，间或可以省略。
而whether有词义，意为、“是否”。
这时主句的主语常常是些抽象名词，如question，trouble，problem等。
表语从句对主句主语进行说明、解释，使主语的内容具体化。
The trouble is that I have lost his addressThe question is whether they will be able to help us.问题是他们是否能帮我们。
The trouble is (that) she has lost his money.The question is whether we need more ice cream.The problem was that it was too valuable for everyday use.What she could not understand was that fewer and fewer students showed interest in her lessons.3、由关系代词引导的表语从句。
关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever 等引导表语从句，在句中作主语、宾语、表语，关系代词不能省略。
The question is which of us should go.The problem was who could do the work..That's what he is worrying about.That's what we should do.The problem is who we can get to replace her.问题是我们能找到谁去替换她呢。
The question is how he did it.问题是他是如何做此事的。
That was what she did this morning on reaching the attic.那就是她今晨上了阁楼干的。
4、由关系副词引导的表语从句。
Go and get your coat.It's where you left it.I had neither a raincoat nor an umbrella.That’s why I got wet through.That is how mice ruin many stores of grain every year.That is what he is worried about.5、由连词because，as if/as though等引导的表语从句。
He looked just as he had looked ten years before.他看起来还与十年前一样。
注：从属连词if一般不用来引导表语从句，但as if却可引导表语从句，如：All this was over twenty years ago，but it’s as if it was only yesterday.这都是20多年前的事了，但宛如昨天一样。
能跟表语从句的谓语动词一般为系动词be，seem，look等。
如：It looked as if it was going to rain.看起来天要下雨了。
It looked as if it was going to snow.That's because we never thought of it..It seems as if he didn’t know the answer.另外，在一些表示“建议、劝说、命令”（suggestion，proposal，order，plan, advice, request, idea）的名词后面的表语从句中，谓语动词用虚拟语气。
should+动词原形表示，should可省略。
如：My idea is that we (should) think it over before accepting it.She denied the doctor’s proposal that she (should ) quit smoking .My suggestion is that we （should）start early tomorrow.我的建议是我明天一早就出发。
1. The question is ________ we will have our sports meet next week.A. thatB. ifC. whenD. whether2．The reason why he failed is ________he was too careless.A. becauseB. thatC. forD. because of3. Go and get your coat. It’ s ________you left itA. whereB. thereC. there whereD. where there4．The problem is _________to take the place of TedA. who can we getB. what we can getC. who we can getD. that we can get5. What I want to know is ______ he likes the gift given by us.A. thatB. ifC. whetherD.不填6. The reason is_________I missed the bus.A. thatB. whenC. whyD. what7. That is __ ___ we were late last time.A. thatB. whenC. whyD. what8. She looked _________ she were ten years younger. A. that B. like C. as D. as though9.—I fell sick!--I think it is _______ you are doing too much.A. whyB. whenC. whatD. because10. The reason why he hasn’t come is ___________.A. because his mother is illB. because of his mother’s being illC. that his mother is illD. for his mother is ill11. —He was born here.-- That is _______ he likes the place so much.A. that B. what C. why D. how12.That is ______ Lu Xun once lived.A. what B. where C. that D. whythat/what的区别1．_______your father wants to know is________ getting on with your studies.A. What; how are youB. That；how you areC. How；that you areD. What；how you are2. The trouble is__________we are short of tools.A. whatB. thatC. howD. why that3. America was __________was first called “India” by Columbus.A. whatB. whereC. the placeD. there where4. China is becoming stronger and stronger. It is no longer_________ .A. what it used to beB. what it was used to beingC. what it used to beingD. what it was used to be5. ________he really means is ________he disagrees with us.A. What … that B. That … whatC. What … what D. That … what6. The energy is ________ makes the cells able to do their work.A. that B. which C. what D. such高考练习1 —I drove to Zhuhai for the air show last week .—Is that_____ you had a few days off？A. why B .what C. when D. where2 .I had neither a raincoat nor an umbrella ____I got wet through.A. It’s the reasonB. That’s whyC. There’s whyD. It’s how3. See the flags on top of the building? That was ______ we did this morning.A. whenB. whichC. whereD. what4. --- Are you still thin king about yesterday’s game?---Oh, that’s _____.A. what makes me feel excitedB. whatever I feel excited aboutC. how I feel about itD. when I feel excited5. What surprised me was not what he said but ______ he said it.A. the wayB. in the way thatC. in the wayD. the way which二，主语从句引导主语从句的关联词有三类：1）从属连词：that，whether等.that 引导主语从句只起引导作用，本身无实际意义，在主语从句中不充当任何成分，但不能省略。