问题描述：
you can’t have this football back since you promise not to kick it at my cat aga
You..."You can't have this football back_____ you promise not to kick it at my cat again,
答案是until 解释是因为promise不是过去式?
那么是不是如果是过去时 我就可以用because ,since
You..."You can't have this football back_____ you promise not to kick it at my cat again,
答案是until 解释是因为promise不是过去式?
那么是不是如果是过去时 我就可以用because ,since
问题解答：
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