complain可用作及特與不及物動詞、名詞或動名詞、可用于進行時態。相關詞組有complain bitterly痛苦地訴說、complain constantly經常地抱怨、complain about（at, of）抱怨，訴苦等。

complain用法

vi. 1. 抱怨,發牢騷;訴說(病痛bai等)[(+to/about/of)]

I've really got nothing to complain of.我確實沒有什么可抱怨的。

He complained to me about the food.他向我抱怨伙食不佳。

2. 控訴,投訴[(+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蘋果。

vt. 1. 抱怨;控訴[Y][+that]

He complained that the exam was too hard.他抱怨考試太難了。

詞組：

complain about對……不滿

complain about sth 抱怨某事

complain to sb 想某人抱怨

complain that+從句 抱怨某事

complain to sb (about sth) 向某人抱怨某事

complain of sth 訴說病痛

complains box是意見箱的意思

complain of 抱怨；抗議