----Mary broke up with me!
----You ______ have forgotten about the Valentine's Day.
A.shouldn'tB.couldn'tC.needn'tD.mustn't
A  

試題分析:考查情態(tài)動(dòng)詞+have done的用法:A.shouldn't have done本該做…而沒(méi)有B.couldn't   have done過(guò)去不可能做了,C.needn't  have done 本不必做…而做了,D.mustn't和完成式連用只能用于肯定句,句意:--瑪麗和我分手了!--你本不該忘記情人節(jié)。選A。
點(diǎn)評(píng):情態(tài)動(dòng)詞表推測(cè)注意以下解題步驟:認(rèn)真審題,結(jié)合所給出的語(yǔ)境,正確把握說(shuō)話者的語(yǔ)氣、情感、態(tài)度、觀點(diǎn)等。認(rèn)真思考所給選項(xiàng)中情態(tài)動(dòng)詞的基本特征和用法,并結(jié)合語(yǔ)境推敲答案。要注意把握時(shí)間概念。情態(tài)動(dòng)詞無(wú)論是表達(dá)“推測(cè)和可能性”,還是表達(dá)“虛擬”這一概念,只要是對(duì)過(guò)去已經(jīng)發(fā)生的事情進(jìn)行描述,一律用“情態(tài)動(dòng)詞+have done”這一結(jié)構(gòu);對(duì)現(xiàn)在或?qū)?lái)的事情進(jìn)行描述,用“情態(tài)動(dòng)詞+動(dòng)詞或系動(dòng)詞原形”。
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