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课件网) Unit 5 Topic 2 复习课件 1.语法知识： As.....as引导的同级比较 Because引导的原因状语从句 2.重点短语讲解 3.短语归纳总结 1.语法知识： （一）As.....as引导的同级比较 （二）Because引导的原因状语从句 （一）同级比较 状语从句中有一类称为比较状语从句，引导比较状语从句的从属连词主要为 as...as（和……一样），not as/so...as（不如……） 1. 肯定句句型结构： 主语A + 谓语动词 + as + 形容词/副词原级 + as + 对比物B”，意为“A与B一样……。 e.g. She is as beautiful as Fan bingbing. e.g.Lucy is as tall as Lily. e.g. I write as well as Tom. e.g. He speaks English as well as Michael.（good好 形容词 well好 副词） （解释：如果谓语动词是be动词，as....as的中间用形容词的原型。如果谓语动词是实意动词as....as的中间用副词的原型。因为形容词修饰be动词，副词修饰实意动词） 否定句句型结构： 主语A + 谓语动词否定形式not + as / so + 形容词/副词原级 + as + 对比物B， 意为“A不如B……”。 e.g. She is not as/so beautiful as Fan bingbing. e.g.Lucy isn't as tall as Lily. e.g. I don't write as well as Tom. e.g. He doesn’t speak English as/so well as Michael. （解释:如果谓语动词是be动词，变否定句就在be动词后加not。如果谓语动词是实意动词，变否定句就在实意动词前加助动词don't/doesn't/didn't。在否定句中，第一个as可以换成so ,也可以不换，只有在否定句中才能换成so） (3)表示倍数，如“一半/两倍/三倍/四倍……”相当于“half/twice/three times/four times/....+ as....as....”结构。 e.g.The room is twice as large as that one. 这个房间是那个房间的两倍大。 e. g. _____ “他和我一样高。” He isn’t as/so tall as me/I. “他不如我高。” = I am taller than he/him. “我比他高。” _____ “她做作业和他一样认真。” She doesn’t do her homework as/so carefully as he/him. “她做作业不如他认真。” = He does his homework more carefully than she/her. “他做作业比她认真。” He is as tall as me/I. She does her homework as carefully as he/him. 同义句转换 学以致用，你掌握了吗？ 一、单项选择。 1. The little girl felt upset ____ her pet dog died. A. why B. because of C. because D. what 2. The weather in Beijing is not ____ good ____ that in Hainan. A. as; than B. so; as C. than; as D. as; so 3. Our classroom is ____ clean ____ it was yesterday. A. too; as B. so; as C. not as; as D. much; than C B C 句型大闯关 二、根据句意用适当的单词填空。 –Who did it better, Lucy or Lily? – I think Lucy did just as _____ as Lily. 2. I don’t like this film. It’s _____ _____ interesting _____ that one. 3. Tom is _____ tall _____ his brother. 4. The roads there are _____ _____ clean _____ those in Longyan. 5.I didn’t go to the Great Wall the weather was bad.? 6.I didn’t go to the Great Wall the bad weather.? well not as as as as not as as because because of (二)原因状语从句 1. 定义：在句中用来说明主句原因的句子叫原因状语从句。 （解释：从句就是两个或者两个以上的简单句组合成一个句子。这里的引导词Because表示因为，主句表示结果，从句表示原因，由Because把两个简单句合成了一句话，所以叫作原因状语从句。） 2. 常用引导词: because (因为), as (由于), since (既然), now (that ... ...
