there is no doubt whether和there is no doubt that 的区别?

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there is no doubt whether和there is no doubt that 的区别?

2.doubt+宾语从句
(1)在否定句和疑问句中,doubt后面接that引导的宾语从句.例如:
I don”t doubt that he can finish the task on time.我相信他能按时完成任务.
Do you doubt that she will succeed?你怀疑她会成功吗?
(2)在肯定句中,doubt后面一般接whether或if引导的宾语从句.例如:
I doubt whether they can swim across the river.我怀疑他们能否游过河去.
He doubts if she will keep her word.他不敢肯定她是否会遵守诺言.
注意:在肯定句中,doubt后面也可以接that引导的宾语从句,但表示疑虑较大或“不相信”.

there is no doubt that
这个是比较正确的用法。因为no doubt意思是毫无疑问。既然是毫无疑问,那接着一定要用that 来。
例:there is no doubt that my english is good.
我的英语好,这是毫无疑问的。
如果以whether来举例:
there is no doubt whether or ...

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there is no doubt that
这个是比较正确的用法。因为no doubt意思是毫无疑问。既然是毫无疑问,那接着一定要用that 来。
例:there is no doubt that my english is good.
我的英语好,这是毫无疑问的。
如果以whether来举例:
there is no doubt whether or not my english is good. Because it is!
所以如果用到whether的话,就好像是在问一个强化自己立场的问题。比较没有那么直接。

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