The sooner the better.

越快越好。

Are you sure?

你确信吗？

I can't afford it.

我买不起。

I envy you your health.

我羡慕你健康和身体。

It's a pain in the neck having to meet them at the airport.

必须到机场去接他们，真讨厌。

You must be crazy to go walking in such awful weather.

你一定是头脑发昏了，这么坏的天气还去散步。