英語語法it常用句型20種

1、英語語法it常用句型20種1. It is + 被強(qiáng)調(diào)部分 + that . 該句型是強(qiáng)調(diào)句型。將被強(qiáng)調(diào)的部分放在前面，其它部分置于that之后，被強(qiáng)調(diào)部分可以是主語，賓語，表語或狀語，強(qiáng)調(diào)的主語如果是人，that可以由who換用。如果把這種句型結(jié)構(gòu)劃掉后，應(yīng)該是一個(gè)完整無缺的句子；這也是判斷強(qiáng)調(diào)句型與其它從句的方法。 It was about 600 years ago that the first clock with a face and an hour hand was made. It was they that (who ) cleaned the classroom yester

2、day. It was in the street that I met her father. 2. It is not until + 被強(qiáng)調(diào)部分 + that . 該句型也是強(qiáng)調(diào)句型。主要用于強(qiáng)凋時(shí)間狀語，譯成漢語直到才，可以說是 not . until . 的強(qiáng)調(diào)形式。 It was not until she took off her dark glasses that I realized she was a famous film star. = Not until she took off her dark glasses did I realize she was a fam

3、ous film star. = I didn't realize she was a famous film star until she took off her dark glasses. 3. It is clear ( obvious， true， possible， certain.) that . 該句型中it 是形式主語，真正的主語是that 引導(dǎo)的主語從句，常譯為清楚（顯然，真的，肯定）是主語從句最常見的一種結(jié)構(gòu)。 It is very clear that he's round and tall like a tree. = That he's ro

4、und and tall like a tree is very clear. 4. It is important ( necessary， right， strange， natural.) that . 該句型和上一個(gè)同屬一個(gè)句型；由于主句中的形容詞不同，that 后的從句中要用虛擬語氣（should + 動(dòng)詞原形），should 可以省去，建議記住該句型中的形容詞。 It is important that we (should) learn English well. It is necessary that he (should) remember these words. 5.

5、It is said (reported， learned.) that . 該句型中的it 仍是形式主語，真正主語是that 引導(dǎo)的主語從句；該結(jié)構(gòu)常譯為據(jù)說（據(jù)報(bào)道，據(jù)悉）。 It is said that he has come to Beijing. It is reported that another earth satellite has been put into orbit. 6. It is suggested ( ordered . ) that . 該句型和上一個(gè)同屬一個(gè)句型，主句中的過去分詞是表示請(qǐng)求，建議，命令等詞時(shí)，that后的從句要用虛擬語氣（should +

6、動(dòng)詞原形），should 可以?。怀Ｗg為據(jù)建議；有命令） It is suggested that the meeting ( should ) be put off. It was ordered that we ( should ) arrive there in two hours. 7. It is a pity ( a shame . ) that . 該句型中，that后的從句一般用虛擬語氣（should + 動(dòng)詞原形），should可省去表示出乎意料，常譯為竟然。沒有這種意義時(shí)，則不用虛擬語氣。 It is a pity that such a thing ( should )

7、happen in your class. 這種事竟然發(fā)生在你們班上，真是遺憾！ It is a pity that he is ill. 他生病了，真遺憾！ 8. It is time ( about time ，high time ) that . 該句型中that 后的從句應(yīng)該用虛擬語氣，值得注意的是 常用過去時(shí)態(tài)表示虛擬 有時(shí)也用should + 動(dòng)詞原形，should 不能省，常譯為是（正是）的時(shí)侯 It is time that children should go to bed. = It is time that children went to bed. 9. It is t

8、he first ( second . ) time that . 該句型要和上一個(gè)句型區(qū)別開來，該句型中的 that 從句不用虛擬語氣，而用完成時(shí)態(tài)，。至于用什么完成時(shí)態(tài)，由主句的謂語動(dòng)詞的時(shí)態(tài)決定。如果是一般現(xiàn)在時(shí)，后面從句用現(xiàn)在完成時(shí)態(tài)；如果是一般過去時(shí)，后面從句則用過去完成時(shí)態(tài)，該結(jié)構(gòu)中 that 可以省去；it有時(shí)用 this 替換常譯為是第一（二）次。 It is the first time I have been here. = This is the first time I have been here. 10. It is . since .。 該句型主要用作處理瞬間動(dòng)詞

9、的完成時(shí)，又要和表示一段時(shí)間的時(shí)間狀語連用的問題，主句中是時(shí)間作表語，其時(shí)態(tài)是現(xiàn)在時(shí)或完成時(shí)，since 引導(dǎo)的從句通常是一般過去時(shí)態(tài)，而且是瞬間動(dòng)詞。如果主句是一般過去時(shí)，從句則用過去完成時(shí)。 It is ( has been ) 5 years since his father died. 11. It is . when .。 該句型中的 when 引導(dǎo)的是一個(gè)時(shí)間狀語從句，主句中的 it 指時(shí)間，表語由具體的時(shí)間充當(dāng)，常譯為當(dāng)?shù)臅r(shí)候，是 It was 5 o'clock when he came here. 12. It be . before . 該句型主句中的 it 指時(shí)間

10、， 主句中的時(shí)態(tài)常是將來一般時(shí)或過去時(shí)兩種時(shí)態(tài)主句中的表語多是long， not long ， 3 days ， 2 weeks 等表示時(shí)間段的詞或短語，常譯為之后。 It was 3 days before he went to Beijing. It will be not long before he finishes his job. 13. It happens (seems， looks， appears ) that. 該句型中it是形式主語，that 引導(dǎo)的是主語從句，主句中的happen ， seem等詞是不及物動(dòng)詞。 It happened ( so happened )

11、that he met his teacher in the street. 碰巧. It seems that he will be back in a few days. 看來 14. It takes sb. . to do sth. 該句型中的不定式是真正的主語，it是形式主語，句型中的直接賓語是時(shí)間，常譯為做要花費(fèi)某人。 It took thousands of people many years to build the Great Wall. 15. It is no good (use/fun ) doing sth. 該句型中的真正主語是動(dòng)名詞短語，主句中的表語可以是no g

12、ood ， ( not any good ) ， no use ， ( not any use )。 It is no good learning English without speaking English. 16. It doesn't matter whether ( if ) . 該句型中whether(if) 引導(dǎo)的從句是真正主語，該句型常譯為不論（是否）沒關(guān)系。 It doesn't matter if they are old. 17. It is kind ( of sb. ) to do sth. 該句型中的不定式短語是真正主語，如果不定式的邏輯主語是由

13、of引起，主句中的形容詞必須是能表示邏輯主語特征的形容詞。 常見的有： bad ， brave ， careless， clever ， cruel ， foolish ， good （好心的）， honest ， horrible ， kind ， lazy ， modest ， naughty ， nice（有教養(yǎng)的）， polite， rude ， silly ， stupid ， wise ， wrong（錯(cuò)誤的）等。 這個(gè)句型可以改寫為：sb. is kind to do sth. 。 It is kind of you to say so. = You are kind to sa

14、y so. 18. It is necessary ( for sb. ) to do sth. 該句型與上一個(gè)同屬一個(gè)句型，如果不定式的邏輯主語是由for引起，主句中的形容詞通常是表示重要性，緊迫性，頻繁程度，難易，安全等情況的形容詞。 常見的形容詞有： important， necessary， natural easy ， safe ， common ， normal ， hard ， difficult ， dangerous ， unusual， rare ， impossible ， pleasant等。 =在中的形容詞作表語可以用從句改寫， 如： It is important

15、for her to come to the party. = It is important that she (should ) come to the party. 19. It looks ( seems ) as if . 該句型中it無意義， as if 引導(dǎo)一個(gè)狀語從句。常譯為，看起來好象如果與事實(shí)不相符合，則用虛擬語氣。 It looks as if he is ill.（真的病了） It looks as if he were ill. （沒有生?。?It seemed as if he were dying. 20. We think it important to learn a foreign language. 該句型中的it 作形式賓語，為了記憶方便我們可稱該句型為"6123結(jié)構(gòu)"。 6指主句中常用的動(dòng)詞：think， believe， make， find， consider， fee