1.should have done =ought to have done 本应该做而没做 2.would have done = 本来就会去做某事而没做 3.could have done = 本可以做某事而没做 4.might have done 本可以做而没做 例:They ought to have apologized. 他们本该道歉的。
“be + 不定式”结构 (1) 表示“将来的安排,将来的计划,按计划或安排将要发生的事情 I’m to have tea with Betty this afternoon. 今天下午我将与贝蒂一起喝茶。 The train is to arrive in Xuzhou at 10:25 a.m.. 这趟火车将于10:25到达徐州。
A. not to do B. not to be done C. not to have done D. not having done 3、I' m sorry I couldn't get in touch with him before he left, I ___ him earlier. A. had a telephone B. have phoned C. should have phoned D. should be phoned 4、He...
11. Three hours ___ enough for us to finish the task. a. are b. has c. is d. were 12. Most of his savings ___ in the Xin Hua Bank. a. has been kept b. is being kept c. have kept d. have been kept 13. All that can be done ___. a. has done ...
④"be to do"的2种用法: a) 表示“按计划、安排即将发生某事或打算做某事”。 例:She is to be seen in the lab on Monday. 星期一你准会在实验室见到她。 b) 该做或不该做的事情(语气...
更多内容请点击：成人学士学位英语考试冲关指导7