快的副词用英语怎么表达？

他本不该把车开得那么快。

He oughtn't to have been driving so fast.

你怎么这么快就过来了？

How ever did you get here so quickly?

热带地区黑夜来得快。

Night descends quickly in the tropics.

我们的货物周转快。

We have a fast turnover of stock.

孩子比大人学得快。

Children learn faster than adults.