3)动词的语气：

　　A.掌握非真实条件句中，谓语动词在主句和条件句中的虚拟语气形式。

　　If you had come earlier， you ______ (not miss) the first act of the play.

　　would not have missed

　　If it hadn‘t been for your help， we _____(be) in real trouble.

　　would have been

　　B.在表示建议、命令、要求以及表示“重要性”和“紧迫性”等含义的主语从句、宾语从句、表语从句和同位语从句中，谓语动词常用虚拟语气，由“动词原形”或“should + 动词原形”构成。 should 常常省略

　　I would recommend that you _______(think) about doing something similar for yourself. (should) think

　　It was imperative that students ______(finish) their papers before July 1st.

　　(should) finish

　　C.动词wish 、would rather (sooner)、if only、as if 后的虚拟语气。

　　I would rather he _____(buy) the house next year.

　　bought ( 表示从句中动作尚未发生)

　　She treats me as if I ______ (be) a stranger. were

　　The manager told us to be friendly to the visitors as if we _____( meet) them before.

　　had met

　　If only we ______(have) a phone! I‘m tired of waiting outside the public phone box.

　　D.in case ， for fear that ， lest 等词后从句的谓语动词为(should) + 原形。

　　He took his umbrella with him lest it _______ (rain.)

　　(should) rain

　　E.在It is (high) time that 从句中谓语动词一般用过去时动词。

　　It‘s high time that we _______(take) firm measures to protect our environment. took

　　F.时间错综条件句，动词的形式要根据表示的时间调整。

　　如果我们早动身，现在就不会在雨中走了。

　　If we had set out earlier，we wouldn‘t be walking in the rain.

　　(从句中动作发生在过去，主句中动作发生在现在。)

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