Stop wasting our time; I just don't buy your story.

　　不要再浪费时间了，我才不信你的鬼话。

　　Things are usually too good to be true, I won't buy it.

　　事情太好了反而让人难以置信，我不会信的。

　　Even though you tell the truth, nobody is going to buy it.

　　即使你讲实话，也没人信你。

　　那如果某人会买你的帐，信你的话呢，就用“buy”的肯定句式：

　　Do exactly what I told you to do, your mom will buy it.

　　就按照我教你的去做，你妈妈会信的。

　　顺便提一句：给某人买某物呢，一般用”buy somebody something”, 比“buy something for somebody”听上去更地道。

　　Jenifer's finance bought her a house.

　　珍丽佛的未婚夫给她买了座房子。

　　When I turn 20, my parents will buy me a laptop.

　　当我满20岁后，我爸妈会给我买台手提电脑。

　　下面，介绍一个很棒的词：deserve，意思是应受，应得，值得，活该，所以它后面应受，应得的东西可以是好的，也可以坏的。

　　We've been working on the report days and nights, we deserve a long vacation.

　　我们整日整夜地赶这份报告，我们该放个长假了。

　　Tony deserves a reward for his efforts.

　　托尼的努力值得奖励。

　　I deserve putting on a nice dress and going to a party tonight.

　　我今晚要奖励一下自己，穿上漂亮的裙子去参加派队。

　　You deserve the criticism because you're always late for work.

　　你工作老迟到，是该受到批评。

　　David deserves the loss of her girlfriend; he never really cares about her. 大卫被女朋友甩了，活该，他从来就没能真正地关心过她。

　　You deserve it!

　　你活该