doubt,suspect,question的区别？

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)

question
1. 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

doubt强调是真或者是假
suspect指怀疑，一种程度，如被怀疑是小偷
question指疑问，可以是问题等

Doubt一般的怀疑,suspect比较肯定的怀疑,心中已经有答案;quest