2)动词的语态:主要掌握各个时态的被动式。
The nations that _______actively ________(involve) in earthquake prediction programs include Japan, Russia, and the United States. are involved
There __________(estimate) to be more than 20,000 overseas domestic servants working in Brtain in 1995. were estimated
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
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