1、Who will win the match is still unknown. I want to know what he has told you. The fact is that we have lost the game. The news that we won the game is exciting. 主語從句主語從句賓語從句賓語從句表語從句表語從句 名詞性從句名詞性從句的作用相當于名詞，因此主語從的作用相當于名詞，因此主語從句、表語從句句、表語從句 、賓語從句和同位語從句分別作、賓語從句和同位語從句分別作主句的主語、表語、賓語和同位語。主句的主語、表語、賓語和同位語。同位語

2、從句同位語從句主語從句主語從句在句中充當主語的從句叫做主語從句。在句中充當主語的從句叫做主語從句。1.連接詞：連接詞：1）從屬連詞：）從屬連詞：that， whether等等.that 引導主語從句只起引導作用，本身引導主語從句只起引導作用，本身無實際意義，在主語從句中不充當任何無實際意義，在主語從句中不充當任何成分，但不能省略。成分，但不能省略。 That she left him cut him to the heart.That he will come is certain.2)連接代詞連接代詞who ，what ，which, whatever, whichever, whoever

3、 What seems easy to some people seems difficult to others.Which side will win is not clear.由由whether及其他連詞引導的主語從句及其他連詞引導的主語從句放在句首，句后都可。放在句首，句后都可。 Whether it will please them is not easy to say.3)連接副詞連接副詞when，where， how， why等等Why he did it remains a mystery.When they will start is not known yet.How he

4、 became a great scientist is known to us all.主語從句后置主語從句后置! 為了避免主語冗長免主語冗長,句子頭重腳輕句子頭重腳輕,經常用經常用it作作形式主語形式主語,主語從句放在后面作真正的主語主語從句放在后面作真正的主語. 例:That we shall be late is certain.- Its certain that we shall be late.1. That the earth is round is known to all.- 2. That you missed the chance is a pity.- It is a

5、 pity that you missed the chance.Its known to all that the earth is round.It + be + 形容詞形容詞 that從句從句It is necessary that 有必要有必要It is important that . 重要的是重要的是It is obvious that 很明顯很明顯It + be + -ed分詞分詞 that從句從句It is believed that 人們相信人們相信It is known to us/all that . 眾所周知眾所周知It has been decided that 已經

6、決定已經決定用用it形式主語的形式主語的that從句有以下四種從句有以下四種不同的搭配：不同的搭配：It + be + 名詞名詞 that從句從句It is common knowledge that 是常識是常識It is a surprise that . 令人驚奇的是令人驚奇的是It is a fact that 事實是事實是It + 不及物動詞不及物動詞 that從句從句It appears that 似乎似乎It happens that . 碰巧碰巧It occurred to me that 我突然想起我突然想起*_(很遺憾很遺憾)we lost the match.*_(這是事

7、實這是事實)he cheated in the exam.It is a pity thatIt is a fact that*_(很可能很可能)she will come back tomorrow.*_(很明顯很明顯)this measure is effective.It is possible thatIt is obvious that*_(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.It happened thatIt occurred to me that*_

8、(據報道據報道)20 people were killed in the accident. *_(建議建議)we should eat more vegetable and do more exercise.It is reported thatIt is suggested that注注 意：意：1.What you left are only several old books.2.What you said is of great importance.3.Whether hell come here is not clear. 1.“if” 不能引導主語從句，應有不能引導主語從句，應

9、有“whether”引引導。導。3.主語從句的主語從句的 “that” 一般不能省。一般不能省。4.“what”引導主語從句時，謂語動詞：引導主語從句時，謂語動詞： 1）常與其后的名詞作表語一致）常與其后的名詞作表語一致 2）根據句子的語）根據句子的語境而定。境而定。4. 主語從句需注意的問題主語從句需注意的問題2.主語從句中用陳述語序主語從句中用陳述語序Make sentences Its certain .well be late. Is he coming or not ？We dont knowWhat does he want to tell us?We dont knowWhen

10、will you come back?It doesnt matter.Its certain that we will be late.That well be late is certain.We dont know whether he is coming or not Whether he is coming is not known.We dont know what he wants to tell us.What he wants to tell us is not known.When you will come back doesnt matter.It doesnt mat

11、ter when you will come back.1.Where shall we spend the holiday isnt decided.2.You have made a mistake is a fact.3.That is certain that we can win.4.No matter who leaves the room last ought to turn off the lights.5.If the policemen will come is not certain.we shallThat you haveIt isWhoeverWhether改錯練習

12、改錯練習1._ he made an important speech at the meeting was true. A. That B. Why C. What D. How 2. _well go camping tomorrow depends 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 bu

13、siness. 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 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

14、off the lights. ThatWhatWhetherWhetherWhoever 6. _ is a fact that English is being accepted as an international language.7.It worried her a bit _ her hair was turning grey. 8. The Foreign Minister said, “_ is our hope that the two sides will work towards peace.”9. After Yang Liwei succeeded in circl

15、ing the earth, _ our astronauts desire to do is walk in space. ItthatItwhat Pick up one number and finish the task in it, then you can get some points.1234567891011 12 13 14 15 16 17 18 19 2021 22 23 24 25 26 27 28 29 30Correct or not?*When the meeting will be held havent been known yet. be held has

16、nt been known yet.Pay attention:主語從句的謂語用主語從句的謂語用單數單數形式形式 10 the cat domade What the cat did made the baby cry.WhatcryMake a sentence301.The question is _ the film is worth seeing.2._ we shall attend the meeting hasnt been decided yet. 用用whetherif填空填空whetherWhether10Translate the sentence*_(他他們很需要幫助們

17、很需要幫助)is quite clear. That they are badly in need of help20talk 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”

18、，只能用，只能用whether, 不能用不能用if10Translate the sentence*It is known to us_(馬克馬克.吐溫怎樣成吐溫怎樣成為一位偉大的作家為一位偉大的作家). how Mark Twain became a great writer20report , 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:注意注意虛擬語氣虛擬語氣在名詞性從句中的在名詞性從句中的使用！在使用！在It is necessary important natural. that句型中，從句的謂語要用句型中，從句的謂語要用should+do 的形的形式式It is important that we should finish.*It is important that we will finish the work on time. 10 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，而不用來引導，而不用