吉林省长春市实验中学高二英语选修六《Unit 4 Period 5》导学案【学习目标】： 学习、掌握介词 it 的用法【自主学习】：1.思考，回忆关于 it 的用法。2.重读课文，在课文中找出几个强调句和含有 it 的句子，理解他们在句中的含义。【问题研究】it 的常见用法I、it 作为代词 可用于代替上文中提到的那一个事物、一件事，不知情的人（不知身份、性别和姓名的人），表示时间、天气、距离、计算结果等。请说明下列例句中的 it 分别表示什么？He failed in the match, and it worried him. —Who is knocking at the door? —It’s me.It was very noisy (quiet) at the very moment.—What time is it? —It’s eight o’clock.It often rains in summer here.It is a long way to the school.II、it 可用于代替不定式、动名词、从句等，充当形式主语和形式宾语，请说明下列例句中 it 的作用。 This has made it necessary for agriculture and industry to develop very quickly.I think it no use arguing with him.I found it very interesting to study English.It is important that we should pay close attention to grain.It is no use crying over spilt milk.It is a pity that you didn’t read the book.It is bad manners for the young to take up the seats for the old．III、 it 可用于构成强调句。 It is (was) + 被强调成分+ that/ who+原句剩余部分请说明下列例句被强调的部分使句子的什么成分。It was I that (who) met Li Ming at the railway station yesterday. It was Li Ming that I met at the railway station yesterday. It was at the railway station that I met Li Ming yesterday. It was not until his wife came back that he went to bed. 思考：比较以下两组句子，分析其句子类型及句式特点It was 8 o’clock when Tom came back. It was at 8 o’clock that Tom came back. It is the house where Tom’s uncle lives. It is in the house that Tom’s uncle lives. IV、it 常用于一些固定结构中，作无人称代词用，充当主语等。1. it is 一段时间 since ….从动作结束...
