It用法及常見句型

1、It用法及常見句型It是代詞，常見的用法有以下幾點： 一、用來代替事或物。例如： Jack is illHave you heard about it？(指代上文Jack is ill這件事) There is a photo on the wallIt is a photo of Lei Feng(指代上文a photo on the wall)二、指代小孩或嬰兒。例如：She has a child and it is nine months old She was holding a baby in her arms and it was crying三、指代天氣、時間、距離、季節(jié)、事物

2、的狀態(tài)或自然環(huán)境等。例如： It will be coldIt is going to snow It is half past seven It is only 5 kilometers to the universityIt was early spring四、代替不定式(短語)、動名詞(短語)或從句等，用作形式主語或形式賓語。例如： It is very important to master a foreign languageIt is no use telling him about that We took it for granted that he would like it

3、. I think it right that you didnt go there五、用于強調(diào)結(jié)構(gòu)。例如： It was not until yesterday that l received a letter from him It was because of her poor health that we did not permit her to go there It was on October 1st,1949 that new China was founded以上是It的最基本的用法，在實際應用中我們常常會遇到難度較大的一些題目與It相關(guān)，這也是高考的熱點和難點。我們一起來

4、看一看： 1 .It is no wonder that Jack has passed the exam 分析：It is no wonder that 為“難怪”之意，It為形式主語，that從句為真實主語,該句型還常以No wonder形式出現(xiàn)。 2 .It is hoped that he will arrive in Shanghai on time 分析：it作形式主語，that從句作真實主語。類似句型還有：Its saidbelieved/expected/reported/announced that等等。 3. It is advised that John arrive(s

5、hould arrive) there on time 分析：It is advised that句型中that從句的謂語動詞需用虛擬語氣，即用should do或do的形式。類似的句型還有：It is insistedorderedsuggesteddemandedrequiredrequested that等等。 4It doesnt matter much whether shell come here We make it a rule to wash hands before meals 分析：在句和句中it分別作形式主語和形式賓語，注意不能用this或that代替。 5Was it

6、 the house where he was born? Was it in the house that he was born? 分析：句中where he was born是一個定語從句，先行詞是the house,故用where或in which引導定語從句。句是強調(diào)句型。判斷一個句子是否是強調(diào)句型，可先把It isthat這個結(jié)構(gòu)拋開，看其余部分能否構(gòu)成一個完整的句子。句還原為He was born the house句子不能 成立，所以不是強調(diào)句型。句則相符，故是強調(diào)句型。6.It is strange that he should get the information in

7、8 days 分析：在It is necessary(important，strange，natural)that等結(jié)構(gòu)的句子中，It作該句的形式主語，其后的主語從句的謂語動詞用虛擬語氣，即用should+動詞原形。7.It is well known to us all that the earth is round As is well known to us all, the earth is round 分析：句中It是形式主語，真正的主語是從句that the earth is round。句中as引導非限制性定語從句，指代后面主句所表達的內(nèi)容，置于句首。8.Its very kin

8、d of you to help us Its very important for us to keep the balance of nature 分析：在句中，形容詞kind，good，nice，foolish，stupid，wrong，clever等用來修飾人，表示人物的品質(zhì)或性格特征，故用of；而句則不可，因為其中的形容詞只能修飾后面的不定式，故用for。9Its no good talking too much Its important to do the work 分析：句常用動名詞作真正的主語，類似句型還有Its no use(useless)doing；句則只能用不定式作真

9、實主語。如：Its importanthelpfulgoodnecessarypossiblerightwrong+to do10It is 2 years since he joined the Party It will be 5 years before they meet again 分析：這類題目很容易混淆，應從時態(tài)入手。句是一個主、從復合句，該句型常是：It+is(has been)+some time十since sb. did sth主句用一般現(xiàn)在時或現(xiàn)在完成時，而從句則用一般過去時。句為It will be(was)+some time before sbdo(did) st

10、h。主句要用一般將來時或一般過去時，before引導的從句則用對應的一般現(xiàn)在時或一般過去時。11.It is (high) time that we went to school 分析：It is (high) time that句型中，that從句的謂語動詞應用虛擬語氣，即用過去式或should+動詞原形。12.It is the first time that l have been to Wuhan.分析：It is the firstsecond time that句型中，that從句中的謂語動詞要用完成時態(tài)，且時態(tài)要和主句保持一致。又如：It was the fifth time t

11、hat the mayor had been invited to our college It用法檢測1I was disappointed with the film I had expected_ to be much better Athat Bthis C one Dit2The Parkers bought a new house but_ would need a lot of work before they can move in Athey Bit Cone Dwhich3I dont think_ possible to master a foreign language

12、 without much memory work Athis Bthat Cthis Dit4I hate_ when people talk with their mouth full Ait B. that Cthese Dthem5Dont_ that all those who get good grades in the entrance examination will prove to be most successful A. take as granted B. take this for granted C. take that of granted D. take it

13、 for granted6_is a fact that English is being accepted as an international language AThere B This CThat Dit7It was because of bad weather_ the football game had to be put off. Aso Bso that Cwhy Dthat8It was for this reason_ her uncle moved out of New York and settled down in a small village Awhich B

14、why Cthat Dhow9Someone is ringing the doorbell. Go and see _. Awho is he Bwho he is Cwho is it Dwho it is10. It was_ he said_ disappointed me Awhat；that B. that；that C. what；what D. that；what11. Was it during the Second World War _he died? A. that B. while C. in which D. then12. Is _necessary to com

15、plete the design before National Day? A. this B. that C. it D. he13. _ is the sun that gives off light and heat, which makes _possible for plants to grow. A. this; them B. that; those C. this; it D. it; it14. Does _ matter whether he cant finish the job on time? A. this B. that C. he D. it15. It was

16、 not _ she took off her glasses_ I realized she was a famous film star. A. when; that B. until; that C. until; when D. when; when16. I was disappointed with the film. I had expected _ to be much better. A. that B. this C. one D. it17. _is a fact that English is being accepted as an international lan

17、guage. A. There B. This C. That D. It18. Our food and service are better than _ used to be.A. it B. we C. they D. them19._ appears to me_ the report must be true.A. That; it B. It; that C. It; it D. That; that20. He feels _duty to help others. A. that he B. that his C. it he D. it his21. The TV sets

18、 made in China are much better than_ in Japan.A. that B. those C. them D. it22. -Im looking for a flat. -Would you like_ with _ garden? A. it; the B. it; a C. one; a D. one; the23. _was _who I met in the museum this morning. A. It; him B. It; he C. That; he D. That; him24. It was through Xiao Li_ I got to know Xiao Wang. A. who B. whom C. how D. that25. _ being March 12th, they planted trees on the hill. A. That B. It is C. It D. This26. -Have you ever seen a whale alive? -Yes, Ive seen_. A. that B. it C. such D. one27. _four years since I joined the army. A. There was B.