complain只能做动词。complainvt.抱怨, 控诉〔常与that从句连用〕They complained that the wages were too low.他们抱怨工资过低。They complained that the price of books had increased.他们抱怨说书的价格提高了。complainvi.抱怨【律】控诉; 抗议(of, about)诉苦; 叫屈说自己有病(of)She is always complaining about something.她总是怨天尤人。The boy complained of a pain in his stomach.这孩子说他肚子痛。