complain
v. 诉说 （病痛）；<文>悲叹，悲鸣；（构造，机械装置）（因拉力或压力）呻吟，咯吱作响；抱怨，投诉
第三人称单数 complains
现在分词 complaining
过去式 complained
过去分词 complained
例句
I was too cowardly to complain.
我胆小得都不敢抱怨。
《柯林斯英汉双解大词典》
All she ever does is complain.
她就会抱怨。
Then they had the gall to complain!
而且他们居然还有脸抱怨！
《牛津词典》
