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--Mum, can I wear my jeans to school?
--No, you ________ wear school uniforms. That’s the school rule.
A.can B.mayC.can’tD.have to
D

试题分析:A. can能够                   B. may可能       C. can’t不可能D. have to不得不,必须;句意:妈妈,我能穿我的牛仔裤去学校吗?不行,你必须穿校服。那是学校的规定。故选D
点评:情态动词用法较多,无人称和数的变化, 情态动词后面跟的动词需用原形,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。中学阶段必须对它们的用法有个基本的了解,题目不难,掌握了平时出现的题目即可答出。
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