doubt的用法我主要想问这个问题：doubt后面什么时候跟that 什么时候跟about 什么时候跟wheter

doubt:怀疑,不信
doubt about后面接单词或词组,这里doubt既可以做动词,也可以做名词.例如：Now I doubt about the meaning of love. There is no doubt about my love.
doubt that 后面接句子,对对某个已发生的事或将要发生的事进行怀疑,如：I doubt that he marries my daughter for money.
我怀疑他和我女儿结婚不是为了钱.
doubt if/whether后接句子,对事情是否会发生或存在进行怀疑
Now I doubt if there true love lives.
试比较
I doubt if she will change her mind.我怀疑她是否会改变想法.
I doubt that she will change her mind.意思是我恐怕她不会改变想法.