资源描述
单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,0,Unit 4,语法专讲,it,的用法大全,Unit 4 语法专讲it的用法大全,1,03/,形式宾语,02/,形式主语,01/,人称代词,it,用法大全,03/形式宾语02/形式主语01/人称代词it用法大全,2,04/,it与one的区别,03/,在某些习惯说法中，可以代替人,02/,代替有生命但不能或不必分阴阳性的东西（包括婴儿）,01/,i,t代替前面（或后面）的单数名词或分句等所表示的事物,05/,it与that的区别,一、人称代词,04/it与one的区别03/在某些习惯说法中，可以代替人0,3,i,t代替前面（或后面）的单数名词或分句等所表示的事物,You cannot eat your cake but have it.（it代替前面的cake）,Although we cannot see it,there is air all around us.,（it代替后面的air）,01,it代替前面（或后面）的单数名词或分句等所表示的事物You,4,代替有生命但不能或不必分阴阳性的东西（包括婴儿）,02,Yesterday we saw a big tree.It was fully twenty metres high.（it代替前面的tree）,The baby cried because it was hungry.,（it代替前面的baby）,代替有生命但不能或不必分阴阳性的东西（包括婴儿）02Yest,5,在某些习惯说法中，可以代替人,03,-Someone is knocking at the door,Peter.,-Who is it?,-Its me.,-Who are singing?,-It is the children.,在某些习惯说法中，可以代替人03-Someone,6,04,it与one的区别：这两个词都可以代表前面说过的名词，但it用于同名同物的场合；one则用于同名异物的场合,-Do you still have the bicycle?,-No,I have sold it.,-Is this knife yours?,-No.It is Xiao Zhangs.Mine is the one on the desk.,04it与one的区别：这两个词都可以代表前面说过的名词，,7,it与that的区别：两词都可代替某一特定名词，但that指同一类，并非同一个,05,The climate of South China is mild（温和的）;I like it very much.,（it指the climate of South China）,The climate of South China is much better than that of Japan.,（that指the climate）,it与that的区别：两词都可代替某一特定名词，但that指,8,二、形式主语,当不定式（短语）、动名词（短语）或从句在某个句子中作主语时，为保持句子结构前后平衡，,避免头重脚轻,，因此常用,it作形式主语置于句首,，而将真正的主语放在句尾。,此时it只起先行引导作用，本身无词义,。例如：,It is wrong to tell a lie.说谎是错误的。,It is no use arguing about it.争吵是没用的。,It is uncertain who will come.谁要来还不确定。,二、形式主语当不定式（短语）、动名词（短语）或从句在某个句子,9,It 作形式主语的常见句型,It+be+形容词+to do sth./doing/that.,。例如：,It is very important to learn a foreign language.,学一门外语非常重要。,It is useless crying over the spilt milk.,覆水难收。,It 作形式主语的常见句型 It+be+形容词,10,It+be+名词词组+doing/that.,It is no good telling lies.撒谎没好处。,It is a pity that you didnt go to see the film yesterday.,你昨天没看成那部电影真遗憾。,It+be+名词词组+doing/that,11,It is said that they have invented a new type of computer.,据说他们发明了一种新型电脑。,It was reported that more than 170 thousand people died in the 2004 tsunami.,据报道，至少有十七万人在2004年那场海啸中丧生。,It+be+过去分词+that.：该句型常见动词有：say,hope,think,suppose,expect,report,know,believe,decide,etc,It is said that they have inve,12,It+seems/appears/happens等不及物动词+that.,It seems that he enjoys pop songs very much.,似乎他非常喜欢流行歌曲。,若句子是疑问形式，就只能用it作形式主语,Is it true that he will go abroad next week?,他下周出国是真的吗？,It+seems/appears/happe,13,It+takes+(sb.)+some time+to do sth.这是一个表示“（某人）花多少时间干某事”的句型，其中it是形式主语，代替后面的不定式（to do sth.）,，句型中的sb.也可以省略,It took me some time to read the reading materials.,我花了一些时间才读完那段阅读材料。,I am not sure,but I think it takes at least nine hours to get there.,我不能肯定，但估计至少要九个钟头才能到那儿。,It+takes+(sb.)+some ti,14,三、形式宾语,当不定式（短语）、动名词（短语）或从句在某个句子中作宾语时，为,保持句子结构平衡,，避免句式结构的混乱，常用,it作形式宾语,，而将真正的宾语放在句尾。此时it仍只起先行引导作用，本身无词义。,三、形式宾语当不定式（短语）、动名词（短语）或从句在某个句子,15,It 作形式,宾,语的常见句型,当不定式（短语）、动名词（短语）或从句在复合宾语结构中作某些动词的宾语时（如think,make,find,consider,feel,suppose等）。,They found it pleasant that they worked with us Chinese.,他们发现与我们中国人一起工作很愉快。,I dont feel it difficult to understand the Special English.,我觉得理解英语特别节目并不难。,It 作形式宾语的常见句型 当不定式（短语）、动名词（短,16,某些表示“喜、怒、哀、乐”的动词，如like,enjoy,love,hate等，往往不能直接接宾语从句,I dont like it that hes so lazy.我不喜欢他那么懒惰。,I hate it when my mother asks me to eat eggs.我讨厌母亲要我吃鸡蛋。,某些表示“喜、怒、哀、乐”的动词，如like,enjoy,17,You may depend on it that we shall always help you.,尽管放心，我们会随时帮你的。,Would you see to it that she gets home early?,你负责保证她早到家，好吗？,He insisted on it that he was innocent.,他坚持说自己是无辜的。,that引导的宾语从句不能直接作介词的宾语,You may depend on it that we s,18,由及物动词与介词组成的固定搭配中，宾语从句若作该动词的宾语时，须借用it,I leave it to your own judgement whether you should do it.,我让你自己判断这事是否该做。,We owe it to you that there wasnt a serious accident.,多亏了你才没有发生严重事故。,由及物动词与介词组成的固定搭配中，宾语从句若作该动词的宾,19,THANKS,THANKS,20,
展开阅读全文