Unit 3 A healthy life Grammar（教师版）

B6U3 Grammar The use of “it” (I) 1.用作代词⑴ 用作人称代词，代替前文出现的事物。Eg：Guangzhou is a beautiful city, isn’t it?练习：My pen is missing. I can ’ t find it anywhere.(我哪儿都找不到它)⑵ 指代动物，性别不明的人或婴儿。Eg：Is this your dog？No, it isn’t.Who is knocking at the door? It might be the poster.My wife gave birth to a baby yesterday. It weighed 4kg. 练习：——Who is it? ——It ’ s me, Henry. (是我，Henry.)⑶ 用以指代指示代词 this/that.Eg：——Whose book is that? ——It’s Mary’s. ——What’s this? ——It’s a watch.练习： ——What’s this? ——It ’ s a kind of food. (这是一种食物。)2.用作非人称代词，表示时间，日期，地点，天气，距离，环境等。Eg：It is ten o’clock.(表示_______)时间，It's May 1, 2007.(表示_______)日期It is a good place which is worth a visit.(表示_______)地点It is a bit windy.(表示_______)天气It is four meters’ walk to the city center from my home.(表示_______)距离It was very quiet in the café. (表示_______)环境练习：It ’ s a good day today. 今天是个好日子。 It ’ s time for the meeting. 是时候开会了。3.It 用作形式主语、形式宾语⑴ 作形式主语1）Eg：It is very clear that he’s strong and tall like a tree. It is a pity that you didn’t attend the party.句型总结①：形式主语 it+be+ adj. / n. + that 从句 2）Eg：It is said that he has been to Beijing.句型总结②：形式主语 it+be+ v-ed + that 从句 注意：用于此句型的常用词有 said, announced, believed, reported 等。3）Eg：It's no use crying over split milk.It's useless trying again.句型总结③：形式主语 it+be+adj. / n. + 动名词注意：用于此句型的常用词有 useless, no use, no good, no pleasure, worth，a waste of time 等。4）Eg：It is illegal for a teenager to drive a car without a license. It is foolish of you to behave like that. It is a shame to have ...