complain用法：
vi. 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。
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. 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