it的用法和练习

主要代词it的使用和练习(包括答案)(1)用作人称代词的用法It的意思是“它”，可以指人，也可以指东西。It可用于替换名词、短语、子句或句子，防止句子中重复。这可以指提到的，也可以指没有提到的，还可以在句子中使用主语、表语、宾语。1)指事物，it可以知道人以外的任何事物或动物。I dropped my watch and it broke。我把表掉在地上醒了。(2)用于指人，it master是指不知道性别的婴儿或只听不到声音的人。(。Is it a boy or a girl？不管是男人还是女人？There is a knock on the door .it must be the postman。“listen .somene is crying .”哦，it must be Mary。我想代替特定代词。代词it可用于代替代词this、that和复合不确定代词something、anything、nothing等。“Whats this？Its a new machine(2)用作非人称代词的2)it1)it主要用作非人的代名词，指时间、距离、价值、天气、温度、温度等自然现象。例如Its too late to go there now .现在去太晚了。It rained all day yesterday。昨天下了一整天的雨。2)用于特定的句型。Its time for sth .我得做点什么。Its to do sth .是时候做点什么了。Its time for sb to do sth .总得有人做点什么。Its (about/high) time that -子句。总得有人做点什么。(子句谓词使用过去时态，有时使用should动词原形)Its first (second) time that-子句。有人第一次做了什么。(子句谓语动词现在完成了)Its期间since子句。一段时间.这样。Its期间before子句。需要多长时间.(3)it用作正式主题。(1)不定式、名词或子句等复合成分在句子主语的时候，为了保持句子的平衡，通常把实际主语放在句子的末尾，句子的开头使用形式主语it。例如it s very important to remember this。it s hard work climbing mountains ins。Its unknown when he will come。2)用作形式主题的重要句型。It be adj. for(of)sb to do sth。有人做了什么.It is hard for him to make up his mind。他很难做出决断。it was foolis of her to say such a thing。她说那种话太愚蠢了。提示：这个句型的介词of和for的区别在于of用于指某人的性格、属性、特征等。介词for表示：“是.表示目标。It takes/took sb时间to do sth。有人花了时间做某事。it took me two hours to finish my homework。It is up to sb to do sth。总得有人做点什么。Its up to you to make the choice。轮到你选择了。 it looks (seems、appears、happens、occurs) that (as if).it seems as though he didn t recognizeme。(4)it用作窗体对象的用法。1)如果否定词、名词或子句等复合成分用作宾语，其后是宾语补语，则一般使用it作为宾语补语前的形式对象，并将实际对象移到句子末尾。其基本结构是“动词it宾语补足语不定式(名词或从句)”I find it difficult to do the job well。I think it best that you should stay here。我们的think it no use complaing。2)用作形式对象的几种特殊结构：动词it that-子句I think it (that) he will come on time。动词it when(if)-子句we rally apprecate it when she offered to help。动词prep。it that-子句I can t answer for it that he will come。我不能保证他会来。动词介词短语that-从句I took it for granted that he would help us。(5)有力的句子中5)it的使用。强句的基本结构由It be部分强调that(who)其他部分。it was a computer that he bought last week。练习部分1.I like in the autumn when the weather is clear and bright . a . this b . that c . it d . one分析在c .句中，like是和宾语动词，后面要跟宾语。like后，不能直接使用子句作为目标。it是特定动词(hate，appreciate .)和介词后可以用作普通对象。He was nearly drowned once。When was？was in 1998 when he was in middle school。A.thatIt B. thisThis C. thisIt D. thatThis分析 a .第一个空that表示上面提到的；第二个空it表示第一个空that。3.the parkers bought a new house but will need a lot of work before they can move in .A.they B. it C. one D. which分析 B其中it是前面提到的a new house。it指的是前面提到的相同内容。One通常表示相似的东西之一。4.somene is ringing the door bell。go and see。A.who is he b . who he is c . who is it d . who it is分析 D，其中it用作人称代词，身份不明，意思是性别的人；宾语从句适用陈述的语序。5.in fact is a hard job for the police to keep order in an important foot ball match .A.this B. that C. there D. It分析 D其中，it用作正式主题。6.Mike s mother kept telling him that he should work hard，but didnt help .A.he B. it C. she D. which解析 B it用于指向前面的句子。可以用that替换。7.since you have repaired my computer，is no need for me to buy a new one。A.it B. there C. this D. that分析 B检查固定句子There is no need for sb to do sth8.the official made clear that he would do everything possible to solve the problem .A.it B. this C. that D. him分析 A，其中it用作格式对象。9.Do you like here？哦，yes，the air，the weather and the way of life。everything is so nice。A.this B. there C. that D. it分析 D其中it表示自然环境。10.bill s aim is to inform the viewers that cigarette advertising in TV is illegal，A.isnt it B. is it C. isnt he D. is he分析A主题是 Bills aim 。11.is mensioned above，the number of the students in senior high school is increasing。A.which B. As C. That D. It在语法分析 B非限制性attributive子句中，as /which可以表示整个句子的内容，但which只能放在基本句子的后面，并翻译为“这一点”。As位置灵活，翻译为“像”。12.it was with great joy he received the news that his lost daughter had been found .A.because B. which C. since D. that分析强调D句型。13.it was back home after the experiement。A.not until midnight did he go b . until midnight that he didn t goC.not until midnight that he went d . until midnight when he didn t go解析 C通过检查not until结构强调句型。14.Why！I have nothing to confess。you want me to say？A.what is it that b . what it is that c . how is it that d . how it is that分析调查强调A句型的特殊疑问句。15.it is the ability to do the job matters not where you come from or what you are。A.one B. that C. what D. it语法分析 B强调句型。突出显示的部分是not where you come from or what you are(but)the ability to do the job .为了平衡结构，部分移到句子末尾1.(据报道)a lot of people lost their jobs in the city last month .(报告)2.(据报道，a lot of people lost their jobs in the city last month .(报告)3.(毫无疑问)he will be admitted to the key university。(doubt)4.He has made some great movies。(这是毫无疑问的)。(doubt)5.(不需要)for you to get up early tomorrow。(need)6.(巧的是)I had been away when he called。(happen)7.(看)nobody knows whathas happened。(seem)8.(可见)its going to rain。(look)9.(可能)the thieves don t know how much it is worth。(likeley)10.(可能)to l