an awful lot 很多，非常多

completely adv. 完全，彻底

incredibly adv. 难以置信地，很，极为

I thanked him an awful lot.

我非常非常感谢他。

We're having an awful lot of rain these days.

我们最近这几天尽下雨。

He is completely retarded.

他实在是智障啊！

I completely understand.

我完全明白。

I laughed incredibly hard. I almost died laughing.

我笑得很厉害。差点儿笑死了。