Doubt:to be uncertain about sth(不太相信或肯定),多指事情(的真实性) eg:I don't doubt that he will come on time.(我毫不怀疑他能准时) I doubt whether/if he is honest.=I doubt his honesty.(我不太相信他的为人) Suspect:怀疑(某程度上的相信或认为) eg:We suspect that he was lost.(我们相信他可能失踪了) They suspect him to be the murderer.(他们怀疑他是凶手)question1.问题;询问[C]She asked me many questions about my adventures in the Arctic.她问了我许多有关我在北极探险的问题.2.要讨论(或考虑)的问题;争端;难题[C]3.怀疑;疑问[C][U][(+about)]There's no question about his honesty.他无疑是诚实的.4.【语】疑问句[C]vt.1.询问;讯问;审问[(+about)]What right do you have to question me?你有什么权利来质问我?Don't question me about my personal business!不要问我个人的私事!2.怀疑,对...表示疑问[+wh-]He questioned her sincerity.他对她的诚意表示怀疑.3.分析,探究vi.1.询问,探问.