问题描述：
until 和unless 有何区别
i won't play with you unless you give up smoking .
until
我觉得都可以,那么说这两个词有什么区别?
she wouldn't go out with me again unless i gave up smoking 此处可以用until
until 用于否定句时，主句用短暂性动词
i won't play with you unless you give up smoking .
until
我觉得都可以,那么说这两个词有什么区别?
she wouldn't go out with me again unless i gave up smoking 此处可以用until
until 用于否定句时，主句用短暂性动词
问题解答：
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