情态动词could,might,may,must,can't的用法,要求：一定是初三阶段的.初三EEC学过的,
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解答
A.could:1."can" 的过去式:They asked if I could drive a car; I said I couldn't; She asked if she could go.2.表示一种可能:I could go but I'm not going to; I could do it next week if you helped me; you c...
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