You ___ learn English well,I am sure,without opening your mouthA needn'tB can't C mustn'tD may not这些情态动词用法有什么区别
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B,这几个词的区别是:needn't不必要(如果表示没有必要做某事,就用needn't) =need not e.g.:You needn't go out (if you don't want to ).你不必出去了(如果你不想出去的话)。 can'tcan not之略 e.g.:Can't I go now? 我现在不可以走吗?mustn'tmust not之略may not
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A needn't 不必要 需要,有必要B can't 不可能 表能力,可能性C mustn't 不一定 客观事实D may not 也许 表祝愿 ,可能性比较小
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B