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)動詞的語氣:
A.掌握非真實條件句中,謂語動詞在主句和條件句中的虛擬語氣形式。
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.在表示建議、命令、要求以及表示“重要性”和“緊迫性”等含義的主語從句、賓語從句、表語從句和同位語從句中,謂語動詞常用虛擬語氣,由“動詞原形”或“should + 動詞原形”構成。 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.動詞wish 、would rather (sooner)、if only、as if 后的虛擬語氣。
I would rather he _____(buy) the house next year.
bought ( 表示從句中動作尚未發(fā)生)
She treats me as if I ______ (be) a stranger. were
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