主語從句講解

1、Grammar 名詞性從句包括：名詞性從句包括：賓語從句：介賓結(jié)構(gòu)；動賓結(jié)構(gòu)賓語從句：介賓結(jié)構(gòu)；動賓結(jié)構(gòu)表語從句：系表結(jié)構(gòu)表語從句：系表結(jié)構(gòu)(系動詞后面跟一個(gè)從句系動詞后面跟一個(gè)從句)主語從句主語從句: 一個(gè)句子做主語一個(gè)句子做主語同位語從句：對名詞進(jìn)行解釋說明同位語從句：對名詞進(jìn)行解釋說明判斷下列從句：判斷下列從句：1.China is no longer what she used to be.2.The question remains whether they will be able to help us.3.It seemed as if I couldnt think of th

2、e right word. 4.The reason why I study hard is that I want to go to a key university. 5.They believe in that she must still be single. 6.I know nothing about him except that he is living in Beijing7. I dont know whether hes free or not.8. Mary asked whether I was doing my homework or not.9. Im think

3、ing of whether we should go fishing.10. We are worried about whether it will rain tomorrow.表語從句表語從句賓語從句賓語從句(1). 連接詞連接詞：that 在句子中不充當(dāng)任何成分，無意義，在句子中不充當(dāng)任何成分，無意義，不可省略不可省略That he will win is certain.That he got the first prize made his parents very happy.That China has become strong is certain.That they lo

4、ve each other is obvious.That he played computer games into night made his parents disappointed.(2). 連接詞連接詞 whether 在句中不充當(dāng)成分，意為在句中不充當(dāng)成分，意為“是否是否”Whether we go by train or by boat makes no difference.Whether life exists on other planets is not clear.Whether hell come here isnt clear. Whether the old b

5、us station should be replaced with a modern hotel or not is under discussion.(3). 連接副詞連接副詞 when(時(shí)間時(shí)間), where(哪里哪里), why(為什么為什么), how(怎么；如何怎么；如何)有詞義，在從句中擔(dān)任狀語。有詞義，在從句中擔(dān)任狀語。Why Chen Lin committed suicide has not been clear yet.How this happened is not clear to anyone.Where he found the treasure remains

6、 a mystery. When we will hold the graduation ceremony has not been decided yet.When they will leave is not decided.(4). 連接代詞：連接代詞：who(誰，主格誰，主格); whom(誰；賓格誰；賓格); whose(誰的誰的); what(什么什么事事/話話); which(哪一個(gè)哪一個(gè)); whoever(無論誰無論誰), whatever(無論什么無論什么), whichever(無論哪一個(gè)無論哪一個(gè)) 在句子中擔(dān)任主語，在句子中擔(dān)任主語，賓語，表語或定語賓語，表語或定語W

7、ho will host the meeting hasnt been decided yet.Which plan is better should be discussed.Whoever comes to China is welcome.Whatever you do in your spare time should do no harm to others. Whoever breaks the law will be punished.主語從句能用主語從句能用it做做形式上的主語形式上的主語(二二) 注意注意: 由由that 引導(dǎo)的主語從句有時(shí)為了使句子結(jié)構(gòu)平衡引導(dǎo)的主語從句有時(shí)

8、為了使句子結(jié)構(gòu)平衡, 避免避免 “頭重腳輕頭重腳輕”, 常用常用 it 作作形式主語形式主語, 而把從句放在而把從句放在后面。后面。 例如例如: 1. That he will refuse this piece of advice is impossible._ _2.That they should like each other is natural. _*it為形式主語為形式主語It is natural that they should like each other.It is impossible that he will refuse this piece of advice.

9、這樣就構(gòu)成了下面一些常用句型這樣就構(gòu)成了下面一些常用句型: 1) It is + n. +從句從句 It is a pity/shame that. 遺憾的是遺憾的是 It is a surprise that令人驚奇的是令人驚奇的是 It is a fact that 是事實(shí)是事實(shí) It is common knowledge that 是常識是常識*_(很遺憾很遺憾)we lost the match.*_(這是事實(shí)這是事實(shí))he cheated in the exam.It is a pity thatIt is a fact that2) It is + adj. +從句從句 Its

10、certain that 肯定肯定 It is possible that. 很可能很可能 It is unlikely that. 不可能不可能 It is obvious that 很明顯很明顯 It is necessary important natural. that*_(很可能很可能)she will come back tomorrow.*_(很明顯很明顯)this measure is effective.+(should) +doIt is possible thatIt is obvious that3) It + be +過去分詞過去分詞+從句從句 It is said

11、that. 據(jù)說據(jù)說 It is known to all that. 眾所周知眾所周知 It is reported that. 據(jù)報(bào)道據(jù)報(bào)道 It is believed that.據(jù)信據(jù)信;人們相信人們相信 It is suggested that + (should）do. 建議建議It must be admitted that必須承認(rèn)必須承認(rèn) It cannot be denied that 不可否認(rèn)不可否認(rèn) It must be pointed out that需指出的是需指出的是 *_(據(jù)報(bào)道據(jù)報(bào)道)20 people were killed in the accident.

12、*_(建議建議)we should eat more vegetable and do more exercise.It is reported thatIt is suggested that4) It +不及物動詞不及物動詞+從句從句 It happened that. 碰巧碰巧 It occurred to me that我突然想起我突然想起_(剛好剛好)I came into the office at that time._(我突然想起我突然想起)I forget to sent the letter.5) It + 及物動詞及物動詞+賓語賓語+that從句從句It worried

13、her a bit that her hair was turning grey.It shocked me that he didnt tell anybody where he was.It happened thatIt occurred to me that主語從句中應(yīng)注意的問題主語從句中應(yīng)注意的問題(一). 語序應(yīng)是陳述句語序語序應(yīng)是陳述句語序How he managed to survive in the forest interested everyone present.When he will come is not known.What he needs is an Eng

14、lish dictionary. (二二). 謂語動詞的單復(fù)數(shù)謂語動詞的單復(fù)數(shù)When we shall hve our sports meeting _(have) not been decided yet. What I need _(be) money. What I need _(be) books. When they will start and where they will go _(have) not been decided yet. When and where the meeting will be held _(have) not been decided. hasi

15、sarehavehas(三三) if/wheter 在主語從句中的用法在主語從句中的用法If the meeting will be put off has not been decided yet.Whether the meeting will be put off has not been decided yet.注意：注意：whether 可以引導(dǎo)主語從句可以放在句首，可以引導(dǎo)主語從句可以放在句首，但但if不能不能(四四). 判斷以下句子是否正確：判斷以下句子是否正確：They should like each other is natural.That they like each

16、other is natural.It is natural that they like each other.錯(cuò)誤錯(cuò)誤正確正確正確正確That引導(dǎo)的主語從句放句首引導(dǎo)的主語從句放句首，既不充當(dāng)成分又無意義，既不充當(dāng)成分又無意義，但但that不能省去不能省去。找出錯(cuò)誤，并給出理由：1.Where shall we spend the holiday isnt 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

17、can win. we shallWhetherItThat you have5. It is ordered we should leave 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.thatisxareareExercises :Part One: 主語從句單選題主語從句單選題1.

18、has helped to save the drowning girl is worth praising.A.Who B.The one C.Anyone D.WhoeverD2.It was he said disappointed me.A.what ;that B.that; that C.what;what D.that;whatA3. well go camping tomorrow depends on the weather.A.If B.Whether C.That D.WhereB4. he said at the meeting surprised everybody

19、present.A.What B. That C.The fact D.The matterA5. was to return to school.A.That really interested him B.What really interested himC.Which really interested him D.That interest him reallyB6. makes mistakes must correct them.A.What B.That C.Whoever D.WhateverC7. your men have been on my land without

20、permission.A.It seems that B.There seems to be C.That seems D.It seems forA8.It has always puzzled me the old man lied a red silk ribbon on the young tree.A.that B.why C.where D.whatB1._ he made an important speech at the meeting was true. A. That B. Why C. What D. How 2. _well go camping tomorrow d

21、epends on the weather . A If B Whether C That D Where 3. It worried her a bit _ her hair was turning gray.A.whether B. that C. what D. when4.What I say and think _ none of your business. A. is B. are C. has D have 1. _ you dont like him is none of my business. 2. _ he said at the meeting astonished

22、everybody present3. _ the 2000 Olympic Games will be held in Beijing is not known yet.4. _ well go camping tomorrow depends on the weather.5. _ leaves the room last ought to turn off the lights. ThatWhatWhetherWhetherWhoever請用恰當(dāng)?shù)闹髡Z從句連詞填空請用恰當(dāng)?shù)闹髡Z從句連詞填空: What ,it ,that , whether, whoeverCorrect or not?

23、*When the meeting will be held havent been known yet. be held hasnt been known yet.Pay attention:主語從句的謂語用主語從句的謂語用單數(shù)單數(shù)形式形式 10 the cat domade What the cat did made the baby cry.WhatcryMake a sentence301.The question is _ the film is interesting.2._ we shall attend the meeting hasnt been decided yet. 用

24、用whetherif填空填空whetherWhether10talk aboutthe use of cell phone What they are talking about is the use of cell phone.Make a sentence30* If we will have a meeting hasnt been decided yet.Correct or not?Whether we will. decided yet.Pay attention:放在名詞性從句放在名詞性從句句首句首，表示，表示“是否是否”，只能用，只能用whether, 不能用不能用if10re

25、port , get the highest points, match It is reported that Yao Ming got the highest points in the match.Make a sentence30 Correct or not?Pay attention:此主語從句此主語從句缺少成分缺少成分-賓語，賓語，故用作成分的故用作成分的what來引導(dǎo)，而不用來引導(dǎo)，而不用that。What she wants to know is.*That she wants to know is when the party will be held . 10 Correct or not?Pay attention:由由th