doubt、suspect与distrust均含“怀疑”之意。
doubt : 普通用词，多指因证据不足或仅凭证据还不能肯定而产生怀疑，多含否定意味。
- They had begun to doubt that it could be done.
他们开始怀疑能否做到。 - He may come back tomorrow with the money, but I very much doubt it.
也许明天他会把钱带回来，但我对此深表怀疑。
suspect : 指猜疑、疑心，肯定意味较多。
- So far, the police do not suspect foul play.
目前，警察没有怀疑是谋杀。 - We had no reason to suspect (that) he might try to kill himself.
我们没有理由认为他会自杀。
distrust : 指疑惑、猜疑，不信任。
- Many politicians are deeply distrusted by the electorate.
很多政治人物非常不受选民信任。
