burn的过去式？

　　burn双语例句

　　Without it, the sun would burn us up .

　　如果没有它，太阳就会把我们烧尽。

　　Why do some people tan and others burn?

　　为什么有些人晒黑和其他燃烧？

　　All their lights are on, upstairs and down, as if they have money to burn.

　　他们的`灯都亮着，不管楼上还是楼下，似乎他们有的是钱可以烧。