David, you _____play with the valuable bottle; you_______ break it.
A.won’t; can’t B.mustn’t; may
C.shouldn’t; must D.can’t; shouldn’t
B

試題分析:句意:大衛(wèi),你最好不要玩這個(gè)貴重的瓶子,你可能會(huì)打破它。mustn’t表示禁止,不允許;may表示可能,can’t表示不可能,shouldn’t表示不應(yīng)該,故選B
點(diǎn)評(píng):情態(tài)動(dòng)詞用法較多,無(wú)人稱和數(shù)的變化, 情態(tài)動(dòng)詞后面跟的動(dòng)詞需用原形,否定式構(gòu)成是在情態(tài)動(dòng)詞后面加 "not"。 must必須肯定的推測(cè),can’t表否定的推測(cè)。個(gè)別情態(tài)動(dòng)詞有現(xiàn)在式和過(guò)去式兩種形式, 過(guò)去式用來(lái)表達(dá)更加客氣, 委婉的語(yǔ)氣, 時(shí)態(tài)性不強(qiáng), 可用于過(guò)去,現(xiàn)在或?qū)?lái)。高中階段必須對(duì)它們的用法有個(gè)基本的了解,題目不難,掌握了平時(shí)出現(xiàn)的題目即可答出。
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