didnt完整形式：did not

没有;未;

Did not 和 didnt 通用因为didnt 是简化版的did not， 不过在正式的书写是不建议用任何的简化

例句：

We did not even make enough money to cover the cost of the food.

我们挣的钱甚至无法糊口

He did not look too pleased when I told him.

我告诉他时，他似乎不是很高兴。

He did not return her love.

他没有回报她的爱