complain at ；complain about ；complain of ；之间的区别与后面加动词用动词什么形式。

complain的中文翻译
不及物动词 vi.
1.
抱怨,发牢骚;诉说(病痛等)[(+to/about/of)]
I've really got nothing to complain of.
我确实没有什么可抱怨的。
He complained to me about the food.
他向我抱怨伙食不佳。
2.
控诉,投诉[(+to/about/of)]
He complained to the police of the boys stealing his apples.
他向警方控告那些男孩偷他的苹果。

及物动词 vt.
1.
抱怨;控诉[Y][+that]
He complained that the exam was too hard.
他抱怨考试太难了。