高中语法主语从句 详解 (4份)

1、 .wd. .wd. .wd.主语从句Noun clauses as the subject主语从句 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。That he finished writing the composition in such a short time surprised us all.What we need are good doctors.Whom we must study for is a question of great importance.1.主语从句的连接词1).连接词: that, whether.That he will win is

2、 certain.Whether hell join us in the discussion is of great importance.2).连接代词: who, what, which, whom , whose, whoever, whatever, whichever.It is clear who is afraid of having a change in land ownership.What India needs is a law to make landownership fairer. 3).连接副词: when, where, why, how, how many

3、, how much , how long, how soon, how oftenWhen well start tomorrow will be told soon.Where we can buy oxen is something weneed to find out.Why he came here is not known.How we can protect the grain from damp needs to be discussed.【连接词】1. thatThat the earth moves around the sunis well known.2. whethe

4、rWhether he will come or not is notknown yet.3. who Who will be sent there has not been decided. 4. whatWhat you need is more practice.5. whichWhich one is the best is not clear.6. when, whereWhere he has gone is a question.7. why, howWhy there is gravity is hard to understand.How he can earn a livi

5、ng in Britainremains a big problem.8. whoever、whatever、whichever可引导主语从句。Whoever comes will be welcome.Whatever he did was right.Whichever of you comes in will receive a prize.【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第三人称单数, 但在连接代词what引导的主语从句后谓语动词的数要根据句意而定。为了防止

6、句子头重脚轻，通常把形式主语it放在主语位置，真正主语后置。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 ameeting.4. It is strange that the man should have stuck to his silly ideas.5. It is a pitythat we wont be able to

7、 go to the south to spend our summer vacation.6. It is still a mystery what caused theaccident. 7. It is said that he has gone to Shanghai.8. It seems that he has seen the film.【小结】1.以that 引出的主语从句,常以形式主语it引导, 构造为：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)。用it 作形式

8、主语的构造(1) It is 名词 从句 It is a fact that 事实是 It is an honor that 非常荣幸(2) It is 形容词 从句 It is natural that 很自然 It is strange that 奇怪的是 It is common knowledge that 是常识(3) It 不及物动词 从句 It seems that 似乎 It happened that 碰巧(4) It be+ 过去分词 从句 It is reported that 据报道 It has been proved that 已证实 It is said that

9、 据说 It appears that 似乎“It 作形式主语代替主语从句的常见句型举例Its + adj. + that / wh- clausee.g.Itsclear / natural / certain that clauseIts + p.p. + that / wh- clausee.g. Its said / reported / known that clauseIts believed that he will come next week.Its obvious that money doesnt grow on trees.It s + n. + that / wh-

10、clausee.g.Its a shame / an honour / good news that clauseIts still a question when well have our meeting.It + v. (n. / pron.) that /wh- clausee.g. It made us very happy that she was chosen.It appears that he forgot to sign the letter.whether与if均为“是否，但以下情况下只用whether ：1. 引导主语从句并在句首Whether he will come

11、 is not clear. 2. 引导表语从句 The question is whether hell come.3. whether从句作介词宾语Im not sure about whether wellwin.4. 引导让步状语从句时 Whether you like it or not, youll have to do it.【本卷须知】1. 主语从句位于句首时必须由连接词引导。2. 主语从句后置时引导词that可省略。3. 主语从句位于句首时,不能用if 引导。4. 主语从句后置时, 可以用if引导。练一练1 _or not is still uncertain.A.Hes c

12、oming B.If he is coming C.That coming D.Whether hes coming2.Its _hell be able to come.A.doubt,whether B.doubtful C.doubt it D.doubtful whether3.It is _that the bridge has existed for more than three centuries.A.appeared B.risen C.said D.born4. _he saw both surprised and frightened him.A.That B.When

13、C.What D.Which5. _is a pity that he should feel so upset.A.What B.That C.He D.ItUse the words below to fill in the blanks1. _ watch was lost is unknown.2. _ you did is right.3. _ we will go for an outing tomorrow remains unknown.4. _ we need is time.5. _ will be our monitor hasnt been decided yet.whether what who whose whatever.那是心与心的交汇，是相视的莞尔一笑，是一杯饮了半盏的酒，沉香在喉，甜润在心。红尘中，我们会相遇一些人，一些事，跌跌撞撞里，逐渐懂得了这世界，懂得若何经营自己的内心，使它柔韧，更适应这风雨征途，而不会在过往的错失里纠结懊悔一生。时光假设水，趟过岁月的河，那些旧日情怀，或温暖或痛楚，总会在心中烙下深深浅浅的痕。生命是一座时光驿站，人们在那里来来去去。一些人假设长亭古道边的萋萋芳草，沦为泛泛之交；一些人却像深山断崖边的幽兰，只