题目内容
8.The little boy feels much better,so you ________ call a doctor.( )| A. | needn't | B. | can't | C. | shouldn't | D. | mustn't |
分析 小男孩感觉好多了,所以你不用喊医生了.
解答 答案:A.结合The little boy feels much better可知好的多了,可以不用喊一声了,needn't不需要,can't不能,shouldn't不应该,mustn't禁止,故选A.
点评 情态动词无人称和数的变化,情态动词后面跟的动词须用原形,否定式构成是在情态动词后面加"not".个别情态动词有现在式和过去式两种形式,过去式用来表达更加客气,委婉的语气,时态性不强,可用于过去,现在或将来.情态动词属非及物动词,故没有被动语态.
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