it的用法归纳VIP

Never be afraid of grammerCollect some examplesWatch them very carefullyFind out something in commonTry to use the rules - practiise。It使用方法完全归纳一、人称代词的使用1.指事物作为人称代词，it可以拥有除人以外的任何事物或动物。例如：I dropped my watch and it broke。我把表掉在地上醒了。Its hard work，but I enjoy it。工作很辛苦，但我很乐意做。“Where is the dog？单击“Its in the bedroom .“”狗在哪里？“在卧室里。2.指人It一词主要用于指性别不详的婴儿或确认某人的身份。例如：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。有人在敲门，一定是邮递员。回复中常用来指自己。例如，Its me .代替特定代词代词it也可以用于代替代词this、that和复合不确定代词something、anything、nothing等。例如：“Whats this？”Its a new machine。“这是什么？“新机器”。Nothing is wrong，is it？没问题吧？二、用作非人称代词1.基本用法It主要用作非人称代词，指时间、距离、价值、日期自然现象，例如气体、气候和温度。例如：Its too late to go there now .现在去那儿太晚了。It rained all day yesterday。昨天下了一天雨。It can get very hot here。这里有时很热。2.用于特定的句型Its time for sth .我得做点什么。Its time 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动词原型”。）Its first (second) time that-子句。有人第一次做某事。(子句谓词现在完成的时候)Its期间since-子句。之后.一段时间。Its期间before-子句。太久了.三、用作形式主题1.基本用法当否定词、名词或子句等复杂成分用作句子的主语时，为了保持句子的平衡，通常把实际主语放在句子的末尾，在句子的开头使用形式主语it。例如：it s very important to remember this。记住这一点很重要。it s hard work climbing mountains ins。爬山是件辛苦的工作。Its unknown when he will come。他什么时候来还不知道。2.用作格式主题的重要句型(1) It be adj. for (of) sb to do sth任何人.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。她说那种话真是愚蠢。【说明】介词of和for的区别如下。of用于指某人的性格、属性、特征等，介词for表示“对.”表示意思的对象(from www.yy )。(2) It takes sb时间to do sth。有人花了时间做某事.it takes years to master a new language。学习新语言花了很多年。这个句型可以有多种变体：it took me an hour to write the letter。=the letter took me an hour (to write)。=I took an hour to write the letter。写这封信花了我一个小时。(3) It is up to sb to do sth。你必须对某人做点什么It s up to you to to make the choice。你必须选择。(4) it look (seem、appear、happen、occur) that as if.it seemed as though he didn t recognizeme。他好像没认出我来。it happened that I was out when he called。他打电话的时候我碰巧不在家。(5) if it were not for./if it hadn t been for.否则.If it were not for their help，we could n t have got over the difficulties。没有他们的帮助，我们无法克服这些困难。四、用作形式对象1.基本用法如果否定词、名词或子句等复合成分用作宾语，然后是宾语补语，一般在宾语补语前使用形式宾语，然后把实际宾语移到句尾。其基本结构是“动词it宾语补足语不定式(名词或从句)”。例如：I find it difficult to do the job well。我发现做好这件事不容易。I think it best that you should stay here。住在这里比较好。We think it no use complaining。我们认为抱怨没有用。用作格式对象的几种特殊结构(1)动词it that-子句。例如：I like it that you came。你来了我很高兴。I take it (that) he will come on time。我想他会准时来的。you can put it that it was arranged before。可以说是以前准备好的。ru mor has it that the defence minister will soon resgn。据传闻，国防部长即将辞职。可以在这个结构中使用的动词不多。通常有have、take、put、like等。(2)动词it when (if)-子句。例如：I dislike it when you whistle。我讨厌听你吹口哨。(from www.yy )we really apprecate it when she offerred to help。谢谢她帮忙。I d prefer it if I didn t have to do so much work。如果我不需要做那么多事就好了。可以在这个结构中使用的动词不多。通常包括enjoy、hate、love、like、dislike、apprecate和prefer。(3)动词prep it that-子句。例如：See to it that youre not late again。请注意千万不要迟到。look to it that this doesn t happen again。请注意不要再发生这种事了。you may rely on it that he ll come to meet you。放心，他会来接你的。I can t answer for it that he will come。我不能保证他会来。(from www.yy )可以在这个结构中使用的动词不多。see to、look to、in sist on、stick to、depend on和answer for。(4)动词介词短语that-从句。例如：I owe it to you that I am still alive。多亏了你，我还活着。I took it for granted that he would help us。我想他会帮我们的。可以在这个结构中使用的动词不多。take it for granted、bring it to sbs attention、owe it to sb等。It使用案例练习I .单一选择。1.was it during the second world war _ _ _ _ he died？A.that B.while C.in which D.then2.is _ _ _ neceary to take off our shoes when we enter the lab？A.everyone B.this C.her D.it3.is _ _ _ _ possible to fly to the moon in a space ship？A.now B.that C.it D.man4.I don t think _ _ possible to master a foreign language without much memory work .A.this B.that C.its D.it5.she heard of a terrible noise，_ _ _ _ _ brought her heart into her mouth。A.it B.which C.this D.that6.Alice received an invitation from her boss，_ _ _ _ came as a surprise。A.it B.that C.which D.he7.does _ _ _ matter if he can t finish the job on time？A.this B.that C.he D.it8.Tom s mother kept telling him that he should work harder，but _ _ _ didn t help .A.he B.which C.she D.it9.the weather turned out to be very good，_ _ _ was more than we could expeect。A.what B.which C.that D.it10._ _ _ _ is a fact that English is being accepted as an international language。A.There B.This C.That D.It11.I hope there are enough glasses for each guest to have _ _ _ _ _。A.it B.those C.them D.one12.it was about 600 years ago _ _ the first clock with a face and an hour hand was made。A.that B.until C.before D.when13.I hate _ _ _ when people talk with their mouths full。A.it B.that C.these D.them14.it was only when I reread his poems recently _ _ _ I began to apprecate their beauty。A.until B.that C.then D.so15.it is the ability to do the job _ _ _ matters not where you come from or what you are。A.o