—Catherine, I have cleaned the room for you.—Thanks. You_______ it. I could ma
题型：不详难度：来源：
—Catherine, I have cleaned the room for you.
—Thanks. You_______ it. I could manage it myself.| A．needn’t do | B．needn’t have done | | C．mustn’t do | D．shouldn’t have done |
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答案
| B |
解析
试题分析：考查情态动词+have done的用法：句意：---Catherine, 我已经为你把房间打扫过了。--谢谢，你本不必打扫。我 自己能行。从第一句话知道是对过去的情况的说明，排除AC，needn’t have done本不必做…而做了，shouldn’t have done本不该做而做了。从句意看是选B。
点评：情态动词+have done的用法：情态动词无论是表达“推测和可能性”，还是表达“虚拟”这一概念，只要是对过去已经发生的事情进行描述，一律用“情态动词+have done”这一结构；对现在或将来的事情进行描述，用“情态动词+动词或系动词原形”。注意不同的情态动词和have done搭配的含义。 |
举一反三
Most of the big hotels in Shanghai were full last week, but finally we______find a room in a small one.| A．ought to | B．could | C．were able to | D．might |
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The boss has given everyone a special holiday, so we ________ go to work tomorrow. | A．can’t | B．mustn’t | C．needn’t | D．shouldn’t |
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–Carla _______ go to that historical museum after school when she was a teenager.
--No wonder she is so familiar with it. | A．could | B．should | C．might | D．would |
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-- Why didn’t you go to Mike’s birthday party yesterday?
-- Well, I _____, but I forgot it.| A．should | B．would | C．should have | D．must have |
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—What does the notice on the wall say?
—“No person take books out of the reading room; otherwise he would be fined.” |
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