If the wound ______ become infected, do not hesitate to call me.
A.shallB.mustC.shouldD.would
C

試題分析:考查虛擬語氣。本題的條件句是一個與將來事實相反的虛擬語氣,使用should+動詞原形構(gòu)成;句意:如果你的傷口被感染,請立刻給我電話。故C正確。
點評:如果過去事實相反,條件句中使用過去完成時,主句使用“情態(tài)動詞+have done”;
如果主句與現(xiàn)在事實相反,條件句中使用過去時,be動詞使用were,主句中使用“情態(tài)動詞+動詞原形”;如果與將來事實相反,條件句中有三種:過去時;were to do ;should+動詞原形,主句使用“情態(tài)動詞+動詞原形”;要特別注意如果省略了if,句子要使用部分倒裝的形式,把助動詞,be動詞,情態(tài)動詞提之主語前。
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