Unit3Grammar同步教学课件新人教版选修6.ppt

第四学时　Grammar ;it的用法(Ⅰ) 1．人称代词it：主要指刚提到的事物，以避免重复。在某些交际用语中，it用以确定一个人的身份。 They watched the train until it disappeared in the distance.(it指代 the train) 他们看着火车，直到它消失在远方。 Her babys due next month.She hopes it will be a boy.(it指婴儿，尤指性别不详时) 她的孩子下个月将出世了，她希望是个男孩。 “Who was that at the door？” “It was a man selling house insurance.” (it 指代a man selling house insurance) 门口的那个人是谁？销售住房保险的。;2．非人称代词it：it有时不指具体的东西，而泛指天气、时间、环境、距离等。 Its over 200 miles from London to Manchester. 从伦敦到曼彻斯特有200多英里。 Its getting competitive in the car industry. 汽车工业方面的竞争日益加剧。 If its convenient，I can see you tomorrow. 要是方便的话，我明天可以见你。 3．先行代词it：it 可以指代较长的主语放在句首。 (1)it代表不定式充当形式主语。 In fact it is a hard job for the police to keep order in an important football match. 事实上警察在重大比赛中维持好秩序是很难的一项工作。;(2)it代表动名词充当形式主语。 It is no use crying over spilt milk. (谚语) 覆水难收。 Its been a lot of fun meeting you. 见到你真是太高兴了。 (3)it代表that或wh-词引导的主语从句。 Has it been decided when we are to hold the sports meeting? 我们什么时候举行运动会决定了吗？ It is very important that he should go to the school of Art. 他应该上艺术学校是非常重要的。;It is a mystery to me how it all happened. 这一切是如何发生的对我来说是个谜。 (4)it代表不定式充当形式宾语。 Many people now make it a rule to buy cards for their friends before Christmas. 现在许多人已形成习惯在圣诞节前为朋友购买贺卡。 (5)it代表动名词充当形式宾语。 I think it a waste of time talking to him. 我认为与他谈话是浪费时间。 ;一、单项填空 1．(2012年安徽卷) A lot of language learning,________ has been discovered, is happening in the first year of life, so parents should talk much to their children during that period. A.as B.it C.which D.this 2．It is none of your business ________ other people think highly of him. A．how B．whether C．which D．when ;3．—He got his first book published.It turned out to be a best seller. —When was ________？ —______ was in 2000 when he was still in college. A．that；This　 B．this；It　 C．it；This　 D．that；It 4．He didnt make __________ clear when and where the meeting would be held. A．this B．that C．it D．these 3．解析：that指代前文他的第一本书成为