主語從句超全講解加練習(xí)

1、1）從屬連詞： that， whether 等.that 引導(dǎo)主語從句只起引導(dǎo)作用，本身無實(shí)際意義，在主語從句中不充當(dāng)任何成 分，但不能省略。That he will win is certa in.他肯定會贏。Whether he ll come here isn他是e否會來這里還不清楚。注意: 由 that 引導(dǎo)的主語從句有時為了使句子結(jié)構(gòu)平衡 , 避免“頭重腳輕”,常 用 it 作形式主語 , 而把從句放在后面。 例如:1. That he will refuse this piece of advice is impossible.2. That they should like ea

2、ch other is natural.這樣就構(gòu)成了下面一些常用句型 :1） It is + n. +從句It is a pity/shame that.遺憾的是It is a surprise that 令人驚奇的是 It is a fact that 是事實(shí)It is common knowledge that 是常識很艮遺憾）we lost the match.（這是事實(shí) ）he cheated in the exam.2）It is + adj. + 從句It s certain that 肯定It is possible that. 很可能It is unlikely that. 不

3、可能It is obvious that 很明顯. that +（should） do 很艮可能）she will come back tomorrow.*（艮明顯）this measure is effective.3）It +不及物動詞+從句It happened that.碰巧It occurred to me that 我突然想起 （剛好） I came into the office at that time.* （我突然想起 ）I forget to sent the letter.4）It + be +過去分詞 +從句It is said that.據(jù)說It is known t

4、o all that. 眾所周知 It is reported that. 據(jù)報(bào)道It is believed that.人們相信 /認(rèn)為It is suggested that + （should）do. 建議（據(jù)報(bào)道）20 people were killed in the accident.* （建議）we should eat more vegetable and do more exercise.2. 連接代詞 who ，what ，which, whatever, whichever, whoever(Who, whom, which, what 可以和 ever 構(gòu)成合成詞， 和

5、 what 一樣引導(dǎo)從句， ever 起到強(qiáng)調(diào)作用。它們在句子中擔(dān)任主干成分，并用陳述句形式 )What many scie ntists believe is that the earth is roundWho will take part in the meeting has not been decided.Whoever breaks the law will be punished.Whatever was said here must be kept secret.3)連接副詞 when，where， how， why 等。Why they suddenly disappeare

6、d still remains a mystery.When they will leave is not decided.How we will paint the house has not been decided.1)主語從句在句首時，必須由連接詞引導(dǎo)，不能省略這些連接詞 誤： They should like each other is natural.正： That they should like each other is natural2) whether 引導(dǎo)主語從句， if 不可誤：If Mary really heard him is really doubtful.

7、正 : Whether Mary really heard him is really doubtful. Complete the sentences using what, whether, where,when， who, why, how or that.1. (is needed for success) is your hard work.2.2.(they will arrive )has been told to the teacher.3. ( we will go tomorrow )hasnt been decided yet.4. (can join in the sp

8、ort meet) is decided by the teacher.5. (it will rain or not) is not clear.Con clusi on:主語從句作主語時，謂語動詞一般用單數(shù)形式。 主語從句的規(guī)律：找出下列句子中的錯誤，并總結(jié)規(guī)律例1. When will he come is not known.正： When he will come is not known.規(guī)律一 、主語從句一律用陳述語序， 即主語在前，謂語在后例 2. He will not come to the meeting this evening is true. 正： That he

9、will not come to the meeting this evening is true.規(guī)律二 、連詞 that 在從句中無實(shí)際意義， 但不能省略。例 3. If the meeting will be put off has not been decided yet.正： Whether the meeting will be put offhas not been decided yet.規(guī)律三 、 whether 可以引導(dǎo)主語從句，放在句首，但 if 不能例 4. That whether he will help others is a fact.正： That he wi

10、ll help others is a fact. 規(guī)律四 、主語從句中的連詞不能重疊使用。例 5. When he will come are a puzzle. 正： When he will come is a puzzle. 規(guī)律五 、含主語從句的主句謂語動詞多用 單數(shù)第三人稱形式。1. What he needs is that book.2. What he needs are some books.規(guī)律六 、what 引導(dǎo)的主語從句，可根據(jù)表語決定主句動詞的單復(fù)數(shù)形式。規(guī)律七 、主語從句為了避免頭重腳輕現(xiàn)象 ,用 it 做形式主語，而把從句放在后面 That the earth

11、turns around the sun is known to all.It is known to all that the earth turns around the sun.找出錯誤，并給出理由：1.Where shall we spend the holiday isn t decided.2. You have made a mistake is a fact.3. If the policeman will come is not certain.4. That is certain that we can win.5.It is ordered we should leave

12、 at once.6. Where he comes from are a mystery.7. What whether he likes the job is not clear.8. Who he is and where he is from is important.9. What he saw is the stars in the sky.1._ he made an important speech at the meeting was true.A. That B. Why C. What D. How2. _we ll go camping tomorrow depends

13、 on the weather .A If B WhetherC That D Where3. It worried her a bit _ her hair was turning gray. whether B. thatC. what D. when4. What I say and think _ none of your business.A. is B. are C. has D have請用恰當(dāng)?shù)闹髡Z從句連詞填空 : What ,it ,that , whether, whoever1. you don t like him is none of my business.2. h

14、e said at the meeting astonished everybody present3. the 2000 Olympic Games will be held in Beijing is not known yet.4. we ll go camping tomorrow depends on the weather.5. leaves the room last ought to turn off the lights.用 whetherif 填空1.The question is the film is interesting.2. we shall attend the

15、 meeting hasnt been decided yet.Correct or not?If we will have a meeting hasn t been decided yet.Whether we will .decided yet.Pay attention放在名詞性從句句首，表示是否”只能用whether,不能用ifThat she wants to know is when the party will be held .What she wants to know is Pay attention此主語從句缺少成分-賓語，故用作成分的what來引導(dǎo)，而不用thatHe

16、 will give up his job surprises all of us.That he will give up Pay attention:由that引導(dǎo)的主語從句放在句首，that不能省略。1._ he made an important speech at the meeting was true.A. That B. Why C. What D. How2. _we ll go camping tomorrow depends on the weather .A If B Whether C ThatD Where3. _ is known to us all that America is a developed country .A Which B As C What