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Unit12 1. be supposed to do .　应该　如： We are supposed to stop smoking. 我们应该停止吸烟。 2...

Unit11 1.宾语从句 宾语从句在复合句中作主句的宾语。 （1）由that 引导 表示陈述意义 that 可省略 He says (that) he is ...

Unit10 1. 过去完成时 (1) 构成：由助动词had + 过去分词构成 否定式：had not + 过去分词 缩写形式：hadn’t (2) 用法 过去...