解释 don't是什么意思和用法

解释 don't是什么意思和用法 don't和isn't的用法? musn‘t和 don't 的用法 not 和don’t 的用法,说明 no和don't区别,怎么用法 needn't和don't need的区别和用法? don't forget用法 don't的用法 isn't和don't和don't的用法,求详细介绍. not和don't用法区别?在线等()()()()()()()()()()()()()()()()()()()()()()(快回答not和don't 的区别! why don‘t you和why not的不同用法 don't 和 not 的用法 要有例子 not to be 和 don‘t be的用法 i don't believe it和i don't believe so有这种用法么? DON'T BE A和DON'T BE A 的用法 举例 isn't/aren't working和doesn't/don't working 用法区别! why don't 的用法 not,don't的用法