I don't buy your story. 我才不相信你说的话呢！
例句：
A:Sorry,I didn't mean to be late.Can I come in?
抱歉，我不是故意迟到的。我能进来吗？
B:What's your excuse this time?
你这次的借口是什么？
A:Have I used the one that my sister is sick?
我已经说过我妹妹生病这个理由了吗？
B:Yes,twice last week.
是的，你上周说过两次了。
A:Are you sure?I thought I said it was my mother.
你确定吗？我觉得我说的是我妈妈生病了。
B:I don't think so.But it could've been.
我可不这么认为，但是也许吧。
A:Well,you can trust me this time.My sister is definitely sick.I'm just coming from the hospital.They say she might even die.
您这次可以相信我。我妹妹真的生病了，我刚从医院回来，他们说她有生命危险。
B:I don't buy your story.Try not to have any more sick relatives this week,all right?
我才不信你的鬼话呢。这周尽量不要再有其他生病的亲戚了，好吗？
A:I'll do my best.
我尽力吧。
B:Just try to be a little more punctual in the future.
以后要准时点。
A:I'm working on it.Really!
我正在努力呢，真的。
