考研英语：每日语法知识点2

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1. 宾语从句：一般疑问句做宾语，引入if或whether

　　例句： I want to know if he will join us in the discussion?

　　2. 原因状语从句：since引导的

　　例句： Don’t eat too much sugar since it is bad for your health.

　　3. 否定词前置倒装：scarcely...when...

　　例句： Scarcely had he arrived at home when it began to rain.

　　4. If虚拟条件句

	从句	主句
跟现在事实相反	一般过去式（be用were）	would/should/might/could +动原
跟过去事实相反	had+done	would/should/might/could+have done
跟将来事实相反	should+动原；were to do sth	would/should/might/could +动原

　　5. 宾语从句：放在介词后面，作介词的宾语。

　　例句：I know nothing about him except that he used to work in Shanghai.

　　6.状语从句省略(分词作状语)：从句的主语和状语从句的主语一致，状从省略采用分词作状语。例句：

　　(Because) being short of money, we can’t afford a TV set. =Because we are short of money, we can’t afford a TV set.

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