用must或can't改变I'm sure that he is a middle school theaher 这个句子

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• 用must或can't改变I'm sure that he is a middle school theaher 这个句子
• 用must或can't改变I'm sure that he is a middle school theaher 这个句子
• Could I watch TV ,Mom? No,you .You must finish your homework first.Could I watch TV ,Mom?No,you（ ） .You must finish your homework first.A.mustn’t B.couldn’t C.may not D.needn’t选哪个?我觉得是B,可是我们老师说是A 知道的能不能解释下,难道是情态动词的回答can't和couldn‘t不一样?什么时候用couldn't什么时候用can't 呢?那么You may be 和You might be能否等同?Excuse me,is this the right way to No.1Middle School?Sorry,I'm not sure.But it ( )be.A/can B.need C .must D.might.这个问题又该选哪个?我们老师说是选D的,可是migh
• We won't be able to do the job well _____(没有) your help.
• We well be together forever OK you must say ' ok '