Question

He ___________ unwisely, but he was at least trying to do something helpful.

1. A.
   may have acted
2. B.
   must have acted
3. C.
   should have acted
4. D.
   would act

Answer 1

A
試題分析：句意：他的行為也許不明智，但是他至少能夠嘗試做一些有幫助的事了。may have done可能已經(jīng)做了；must have done一定做過(guò)某事；should have done應(yīng)該應(yīng)經(jīng)做過(guò)某事； would done過(guò)去將要做。根據(jù)句意故選A。
考點(diǎn)：考查情態(tài)動(dòng)詞的用法。
點(diǎn)評(píng)：本題難度適中。情態(tài)動(dòng)詞是高中階段的重要的語(yǔ)法項(xiàng)目，需要考生掌握它們的不同的語(yǔ)法及區(qū)別，尤其是情態(tài)動(dòng)詞的完成式表示對(duì)過(guò)去的推測(cè)，不同的情態(tài)動(dòng)詞推測(cè)的可能性大小上不同，需要考生理解它們的不同的語(yǔ)法。
即學(xué)即練：Why didn’t you tell me there was no meeting today ? I _____ all the way here through the heavy snow.
A. needn’t have drive
B. can’t have driven
C. mustn’t have driven
D. shouldn’t have driven
解析：A。句意：你為什么不告訴我今天沒(méi)有會(huì)？我本來(lái)沒(méi)必要冒著大雪開(kāi)車(chē)跑這么多路。Needn’t have done表示本來(lái)沒(méi)必要。答案為A。