Unit 4 Global warmingUnit 4The sixth period Teaching methods situational teaching method ; cooperative learning method; programmed teaching method; task-based and assessment teaching methods.Teaching aims and demands一、 topic: Global warming; pollution; the importance of protecting the earth二、 vocabulary三、 functions: Agreement and disagreement①②Blame and complaint四、 grammar : The use of ‘it’Arrangement of teachingthe first period: warming upthe second period: language points of readingthe third period : readingthe fourth period : learning about language and language points of using languagethe fifth period: using languagethe sixth period: grammarthe seventh period: exercises 1. Check up Daily Exercises(II) It 的用法及强调句型 (II) It 的用法及强调句型 性质功 能例 句代词用作人称代词，代替上文提到的人或事物。 — Who is it ? — It’s me. You've helped me a lot; I'll never forget it. 性质功 能例 句代词用以代替指示代词this 或 that 。 — What’s this? — It’s a computer ．— Whose book is that? — It's hers ． 性质功 能例 句代词表示时间、天气、距离、价钱等。 It’s time for lunch ．It’s raining hard ．It’s two miles from the school to our home ．引导词作形式主语 , 代替由不定式、动名词或从句等表示的真正主语。It is easy to buy a new radio.It is no use telling him that.It doesn't matter whether she comes or not. 引导词作形式宾语 , 代替由不定式、动名词或从句等表示的真正宾语。I feel it my duty to help him.We thought it no use doing that.I’ve made it clear that nobody is allowed to smoke here. 引导词表示强调 , 其结构是 : It is/was+ 强调部分 + that+ 原句剩余部分。此结构只限于强调状语、主语和宾语。 注意：①如果强调的是人 , 其后用 that 或 who 均可 ; ② 如果强调的是物、时间或地点等状语 , 其后只能用 that 不用 where 、 when 、why 。引导...
