Thomas _____ a soldier, for he is much too short.
A．needn’t beB． should beC．may beD．can’t be
D

試題分析：句意：托馬斯不可能是一名士兵，因?yàn)樗�。can’t be不可能，表示強(qiáng)烈的否定推測(cè)，故選D
點(diǎn)評(píng)：本題是高考必考考點(diǎn)，一定要牢記句型意思。must表示強(qiáng)烈的肯定推測(cè)，can’t表示強(qiáng)烈的否定推測(cè)，can, could表達(dá)推測(cè)時(shí)，一般用于疑問(wèn)句和否定句中；can用于肯定句中表推測(cè)時(shí)，表示理論上的可能性。另外情態(tài)動(dòng)詞與完成時(shí)態(tài)連用的用法也是重點(diǎn)，如must have done過(guò)去肯定做了某事。should have done 本應(yīng)該做而實(shí)際未做; can’t have done 過(guò)去不可能做了某;shouldn’t have done 本不應(yīng)該做而實(shí)際做了; need have done 本有必要做某事;needn’t have done 本沒(méi)有必要做某事,注意沒(méi)有 mustn’t have done的形式
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