2017届高三英语一轮语法专项学案：第7节情态动词和虚拟语气_高考复习指南

　　3．用于定语从句中

　　It's (high/about) time (that) ...句型中，从句的谓语动词用一般过去时或should＋动词原形(其中should不可省略)，句意为“确实到了……的时候了”。

　　It is high time that we took some measures to solve the problem.

　　确实到了我们该采取措施解决问题的时候了。

　　4．用于as if引导的从句中

　　表示与现在事实相反用一般过去时；表示与过去事实相反用过去完成时。

　　People treat him as if he were a dangerous person.人们把他看作是一个危险人物。

　　He talks as if he had been to many countries.

　　他说起话来好像他去过好多国家似的。

　　5．用于if only引导的感叹句中，其用法相当于wish后的宾语从句。

　　He failed in the exam again. If only he had worked harder.

　　他考试又失败了。要是他早努力些就好了。

　　(对应学生用书第255页)

　　Ⅰ.从下面方框中选择恰当的情态动词填空

　　shall，must，can，could，may，would，ought to，might，should1.________ you get a good result in your experiment!

　　2．________ you rather live in a town，or in the country?

　　3．________ we go to the new restaurant to have dinner?

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