B 6,U 3 Grammar (高中英语选修六第三单元语法)专用课件.ppt

七. It的一些习惯用法 How is it with your study? 学习好吗？ That’s it. 这就对了。 It went hard with him. 他身遇不幸。 It is all over with me. 我完蛋了。 We must fight it out. 我们必须坚持到底。 * Book 6 Unit 3 Grammar: The use of “it” Discovering “It” It rains heavily. 2. It is 20 kilometers from Granddads house to James’. 3. It is November 11, 2005. 4. It is 9 o’clock at night. 5.Itll be lovely in the garden tonight． 6. It is bad to smoke. 7. It is likely that he will succeed. 天气 距离 日期 时间 形式主语 环境 形式主语 it的最基本用法是作代词，主要指刚提到的事物， 以避免重复: Where is my pen? It’s on the ground. 2. 也可以指动物或未知性别的人如婴儿等: Is this your dog？No, it isn’t. 一、it 作人称代词 Who is knocking at the door? It’s me. Who is this baby? It’s my son. It可以指天气、时间、日期、距离、价值、长度、气侯、 温度、环境等，称为非人称的it。 1.指天气： It is a lovely day, isn’t?it? It is a bit windy. 2. 指时间: It is nine o’clock now. 3. 指环境: It is very beautiful here. 4. 指距离： It is half an hour’s?walk?to the city centre from my home. 二、it作非人称代词 5. 指日期： --Whats the date today? --Its Dec. 15, 2012. 6. 指季节： It is winter now. 7. 指重量： It is about 5 kilograms. 8. 指价值： ----Whats the cost of the T-shirt? ----It is 150 yuan. 替代作主语的从句、动词不定式、动名词，而把真正作主语置于句尾。 三、it用作形式主语 （1）It+ be+ adj. for sb. to do sth. 此处adj. 通常为描述事件的形容词：easy，difficult，hard，necessary，unnecessary，possible，impossible，likely，unlikely，right，wrong，important，unimportant，legal，illegal，polite，impolite，clear，obvious，certain，suitable，proper，fit，useful，useless，dangerous… It’s important for us to learn English. It is illegal（for a teenager）to drive a car without a license.　　 1. 代作主语的动词不定式 （2）It +be+ adj. of sb. to do sth. 此处adj. 通常为描述人的形容词：kind，unkind，nice，rude，cruel，considerate，thoughtful，thoughtless，careful，careless，silly，foolish，stupid，clever，wise，crazy. Its kind of you to help me with the problem. Its no good/use doing… Its（well）worth doing… Its no use crying over spilt milk. (3) It替代作主语的动名词的常见句型 2. it作形式主语替代主语从句 It is clear ( obvious，true，possible, certain …) that ... 该句型中it 是形式主语，真正的主语是t