—Catherine,  I have cleaned the room for you.
—Thanks. You_______ it.  I could manage it myself.
A.needn’t doB.needn’t have done
C.mustn’t doD.shouldn’t have done
B

試題分析:考查情態(tài)動詞+have done的用法:句意:---Catherine, 我已經(jīng)為你把房間打掃過了。--謝謝,你本不必打掃。我 自己能行。從第一句話知道是對過去的情況的說明,排除AC,needn’t have done本不必做…而做了,shouldn’t have done本不該做而做了。從句意看是選B。
點(diǎn)評:情態(tài)動詞+have done的用法:情態(tài)動詞無論是表達(dá)“推測和可能性”,還是表達(dá)“虛擬”這一概念,只要是對過去已經(jīng)發(fā)生的事情進(jìn)行描述,一律用“情態(tài)動詞+have done”這一結(jié)構(gòu);對現(xiàn)在或?qū)淼氖虑檫M(jìn)行描述,用“情態(tài)動詞+動詞或系動詞原形”。注意不同的情態(tài)動詞和have done搭配的含義。
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