主語(yǔ)從句講解46292PPT學(xué)習(xí)教案

1、會(huì)計(jì)學(xué)1主語(yǔ)從句講解主語(yǔ)從句講解46292What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.What is even more important is that as the earth cooled down, water began to appear on its surface.What many scientists believe is that the continued presence

2、 of water allowed the earth to dissolve harmful gases and acid into the oceans and seas.表語(yǔ)表語(yǔ)主語(yǔ)主語(yǔ)賓語(yǔ)賓語(yǔ)第1頁(yè)/共18頁(yè)1)連接代詞連接代詞 what (whatever ), who ( whoever) , which (whichever), whom, whose .Which side will win is not clear. Who will write the poem has not been decided yet.Whatever he did is right.What t

3、he city will be still remains a mystery.連接代詞引導(dǎo)主語(yǔ)從句，在句中作主語(yǔ)，賓語(yǔ)，表語(yǔ)，連接代詞引導(dǎo)主語(yǔ)從句，在句中作主語(yǔ)，賓語(yǔ)，表語(yǔ)，定語(yǔ)。定語(yǔ)。定語(yǔ)主語(yǔ)賓語(yǔ)表語(yǔ)第2頁(yè)/共18頁(yè)The earth became so violent that it was not clear whether the shape would last or not.It was not immediately obvious that water was to be fundamental to the development of life.So whether li

4、fe will continue on the earth for millions of years to come will depend on whether this problem can be solved.第3頁(yè)/共18頁(yè)從屬連詞：從屬連詞：that， whether 引導(dǎo)主語(yǔ)從句引導(dǎo)主語(yǔ)從句只起引導(dǎo)作用只起引導(dǎo)作用，在主語(yǔ)從句中，在主語(yǔ)從句中不充當(dāng)任何成分不充當(dāng)任何成分，that本身無(wú)實(shí)際意義，本身無(wú)實(shí)際意義，但不能省略但不能省略. whether意為意為“是否是否”，放在句首句末皆可，放在句首句末皆可。 That price will go up is certain. Th

5、at he will come is certain. Whether we go by train or by boat makes no difference. Whether hell come here isnt clear. 第4頁(yè)/共18頁(yè)Why they suddenly disappeared still remains a mystery.3)連接副詞連接副詞when，where， how，why等等, 在從在從句中做狀語(yǔ)。句中做狀語(yǔ)。How this happened is not clear to anyone. When he will be back depends

6、on the weather.When well start tomorrow will be told soon.Where the test will be given is not yet decided.第5頁(yè)/共18頁(yè)總結(jié)：引導(dǎo)主語(yǔ)從句的連接詞有：總結(jié)：引導(dǎo)主語(yǔ)從句的連接詞有： 從屬連詞從屬連詞: that, whether； 連接代詞連接代詞: who (whoever), whom, whose, what (whatever)和和which (whichever)； 連接副詞連接副詞: when, where, how和和why。第6頁(yè)/共18頁(yè)Make sentences :

7、Its certain .well be late. Is he coming or not ？We dont knowWhat does he want to tell us?We dont knowWhen 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

8、 wants to tell us.What he wants to tell us is not known.When you will come back doesnt matter.It doesnt matter when you will come back.第7頁(yè)/共18頁(yè)主語(yǔ)從句后置主語(yǔ)從句后置! 為了避免主語(yǔ)冗長(zhǎng)為了避免主語(yǔ)冗長(zhǎng),句子頭重腳輕句子頭重腳輕,經(jīng)常用經(jīng)常用 it 作作 形式主語(yǔ)形式主語(yǔ),主語(yǔ)從句放在后面作真正的主語(yǔ)主語(yǔ)從句放在后面作真正的主語(yǔ). 例例: That we shall be late is certain. - Its certain that we s

9、hall be late. 1. That the earth is round is known to all. - 2. That you missed the chance is a pity. - It is a pity that you missed the chance.Its known to all that the earth is round.第8頁(yè)/共18頁(yè)A. It + be + 形容詞形容詞 + that 從句從句(obvious, true, surprising, good, wonderful, funny, possible, likely, certain

10、, probable, etc.) 如：如：It is certain that she will do well in her exam. B. It + be + 名詞詞組名詞詞組 + that 從句從句 (an honour, a fact, a pity, etc）如）如：Its a pity that we cant go. 第9頁(yè)/共18頁(yè)C. It + be + 過(guò)去分詞過(guò)去分詞 + that 從句 (said, reported, thought, expected, decided, announced, etc。） 如：It is said that Mr. Green h

11、as arrived in Beijing. D. It + 不及物動(dòng)詞或短語(yǔ)不及物動(dòng)詞或短語(yǔ) + that 從句從句( seem，happen, doesnt matter ,turn out） 。如。如：It happened that I was out that day. It doesnt matter whether she will come or not. 第10頁(yè)/共18頁(yè)1）主語(yǔ)從句在句首時(shí)，必須由連接詞引導(dǎo)，不能省）主語(yǔ)從句在句首時(shí)，必須由連接詞引導(dǎo)，不能省略這些連接詞。略這些連接詞。誤：誤：They should like each other is natural.2

12、)如果主語(yǔ)從句放在句首，不能用如果主語(yǔ)從句放在句首，不能用if引導(dǎo)，但是如果用引導(dǎo)，但是如果用it 做形式主語(yǔ)，而把主語(yǔ)從句放在句末時(shí)，也可以用做形式主語(yǔ)，而把主語(yǔ)從句放在句末時(shí)，也可以用if引導(dǎo)引導(dǎo).誤：誤：If Mary really heard him is really doubtful.注注 意意正：正： That they should like each other is natural. It is natural that they should like each other.正：正：Whether Mary really heard him is really doubt

13、ful. It was doubtful if Mary really heard him.第11頁(yè)/共18頁(yè)1. What you left are only several old books.2. What you said is of great importance.3）主語(yǔ)從句中用陳述語(yǔ)序）主語(yǔ)從句中用陳述語(yǔ)序4）主謂一致）主謂一致 主句謂語(yǔ)一般用單數(shù)形式。主句謂語(yǔ)一般用單數(shù)形式。1. “what”和和“who”引導(dǎo)主語(yǔ)從句時(shí)，謂語(yǔ)動(dòng)詞的數(shù)與主引導(dǎo)主語(yǔ)從句時(shí)，謂語(yǔ)動(dòng)詞的數(shù)與主句中作表語(yǔ)的名詞一致。句中作表語(yǔ)的名詞一致。How he succeeded is still a puzz

14、le.2. 如果如果and 連接兩個(gè)或者兩個(gè)以上的主語(yǔ)從句作主語(yǔ)時(shí)連接兩個(gè)或者兩個(gè)以上的主語(yǔ)從句作主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞用復(fù)數(shù)；由兩個(gè)或多個(gè)連接詞引導(dǎo)一個(gè)主語(yǔ)，謂語(yǔ)動(dòng)詞用復(fù)數(shù)；由兩個(gè)或多個(gè)連接詞引導(dǎo)一個(gè)主語(yǔ)從句時(shí)，謂語(yǔ)動(dòng)詞用單數(shù)。從句時(shí)，謂語(yǔ)動(dòng)詞用單數(shù)。When they will start and where they will go _ not been decided yet.When and where the meeting will be held _ not been decided.havehas第12頁(yè)/共18頁(yè)5) . 用于用于 It is important / natura

15、l / necessary / impossible that.句型中句型中, 主語(yǔ)從句應(yīng)使用虛擬語(yǔ)主語(yǔ)從句應(yīng)使用虛擬語(yǔ)氣氣, 用用“should + 動(dòng)詞原形動(dòng)詞原形”的形式的形式, should有時(shí)有時(shí)可以省略?？梢允÷?。6) . 在在 It + be + suggested/advised/ordered/requested/ insisted/required 中中, that從句的謂語(yǔ)也應(yīng)該用從句的謂語(yǔ)也應(yīng)該用“should + 動(dòng)詞原形動(dòng)詞原形”的形式的形式, should有時(shí)可以省有時(shí)可以省略。略。第13頁(yè)/共18頁(yè)1.Where shall we spend the holid

16、ay 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(cuò)練習(xí)改錯(cuò)練習(xí)第14頁(yè)/共18頁(yè)6.It is say that he was a famous writer.7.It is

17、 seemed that it is going to rain soon .8.That is fact that she won the first place.9. Who leaves the room last ought to turn off the lights.10.It is important that a student learns a foreign language.said seemsIt is a factWhoevershould learn第15頁(yè)/共18頁(yè)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._ is known to us all that America is a developed country . A Which B As C What D It 第1