关于doubt的句子用that还用whether,
问题描述：
关于doubt的句子用that还用whether,
答
doubt当动词时,在中后面可接if或whether。
在否定句及疑问句中可跟that从句。
有时在中也能跟that从句,但其含义是"恐怕...不会"。
答
简单说就是在否定句与疑问句中用that接从句~在肯定句中用whether或if来连接
如：there is no doubt that...毫无疑问...
I doubt whether he will come. 我看他不见得会来
答
doubt的肯定形式后接whether/if从句,否定和疑问形式后接that从句
I doubt whether/if he can speak English.(肯定句)
I do not doubt that he can speak English.（否定句）
Do you doubt that he can speak English?（疑问句）
而be sure的肯定疑问形式后接that从句,否定形式后接whrther/if形式
I am sure that he can do it well.(肯定句)
Are you sure that he is a teacher?(疑问句)
I am not sure whether/if the news is true.(否定句)
答
doubt whether....怀疑。。
do not doubt that... 不怀疑。。。