Question

I regret ________ up to watch the football game last night.I am very tired and sleepy now.

A. stay    B. to stay    C. staying    D. stayed

Answer

C

【解析】句意：我后悔昨晚熬夜看足球赛了。我现在又累又困。regret to do sth.很遗憾地／抱歉地做...（事情还没有做）；regret doing sth.很遗憾/后悔做了...（为已经做过的事而感到...）。根据I am very tired and sleepy now.判断，事情已做，故答案为C。

点睛：当remember，forget，regret后面用动名词作宾语时，意思是“……做过某事”；后跟动词不定式作宾语时，意思是“……还没有做过某事”如：  

1. I remembered seeing him somewhere.我记得在什么地方见过他。(已经见过他)

2. I remembered to see the film。我记着要看这部电影。(还没有看)

3. I forgot teaching the students the words.我忘记了曾教过学生们这些词。(教过)

4. I forgot to teach the students the words。我忘了教学生们这些词。(没有教)