It用法及常见句型

1、it用法及常见句型it是代词，常见的用法有以下几点： 一、用来代替事或物。例如： jack is illhave you heard about it？(指代上文jack is ill这件事) there is a photo on the wallit is a photo of lei feng(指代上文a photo on the wall)二、指代小孩或婴儿。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、指代天气、时间、距离、季节、事物

2、的状态或自然环境等。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(短语)、动名词(短语)或从句等，用作形式主语或形式宾语。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、用于强调结构。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，在实际应用中我们常常会遇到难度较大的一些题目与it相关，这也是高考的热点和难点。我们一起来

4、看一看： 1 .it is no wonder that jack has passed the exam 分析：it is no wonder that 为“难怪”之意，it为形式主语，that从句为真实主语,该句型还常以no wonder形式出现。 2 .it is hoped that he will arrive in shanghai on time 分析：it作形式主语，that从句作真实主语。类似句型还有：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从句的谓语动词需用虚拟语气，即用should do或do的形式。类似的句型还有：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分别作形式主语和形式宾语，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是一个定语从句，先行词是the house,故用where或in which引导定语从句。句是强调句型。判断一个句子是否是强调句型，可先把it isthat这个结构抛开，看其余部分能否构成一个完整的句子。句还原为he was born the house句子不能 成立，所以不是强调句型。句则相符，故是强调句型。6.it is strange that he should get the information in

7、8 days 分析：在it is necessary(important，strange，natural)that等结构的句子中，it作该句的形式主语，其后的主语从句的谓语动词用虚拟语气，即用should+动词原形。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是形式主语，真正的主语是从句that the earth is round。句中as引导非限制性定语从句，指代后面主句所表达的内容，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，形容词kind，good，nice，foolish，stupid，wrong，clever等用来修饰人，表示人物的品质或性格特征，故用of；而句则不可，因为其中的形容词只能修饰后面的不定式，故用for。9its no good talking too much its important to do the work 分析：句常用动名词作真正的主语，类似句型还有its no use(useless)doing；句则只能用不定式作真

9、实主语。如：its importanthelpfulgoodnecessarypossiblerightwrong+to do10it is 2 years since he joined the party it will be 5 years before they meet again 分析：这类题目很容易混淆，应从时态入手。句是一个主、从复合句，该句型常是：it+is(has been)+some time十since sb. did sth主句用一般现在时或现在完成时，而从句则用一般过去时。句为it will be(was)+some time before sbdo(did) st

10、h。主句要用一般将来时或一般过去时，before引导的从句则用对应的一般现在时或一般过去时。11.it is (high) time that we went to school 分析：it is (high) time that句型中，that从句的谓语动词应用虚拟语气，即用过去式或should+动词原形。12.it is the first time that l have been to wuhan.分析：it is the firstsecond time that句型中，that从句中的谓语动词要用完成时态，且时态要和主句保持一致。又如：it was the fifth time t

11、hat the mayor had been invited to our college it用法检测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 aw

14、hich bwhy 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

15、to complete 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.

16、it was 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 internation

17、al language. 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 t

18、v sets 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