there is no doubt that he will come to help usthat 为什么不能用whether 或 if他是否会来帮助我们是毫无疑问的

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there is no doubt that he will come to help usthat 为什么不能用whether 或 if他是否会来帮助我们是毫无疑问的
there is no doubt that he will come to help us
that 为什么不能用whether 或 if
他是否会来帮助我们是毫无疑问的

there is no doubt that he will come to help usthat 为什么不能用whether 或 if他是否会来帮助我们是毫无疑问的
no doubt that,后面引起的是从句.意思是毫无疑问他可以来帮我.如果换成whether,if,翻译不妥当啊.而且whether一般后面跟着not.whether he will come to help us or not.if 更不对了.

whether 和 that 都可以引导宾语从句，但有所不同。如果宾语从句表示两种可能性居其一时，只能用whether（or not 可省略），不可用that。
e.g.They doubt whether the news is ture or not.
I wonder whether he knew the manager(or not).
如果...

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whether 和 that 都可以引导宾语从句，但有所不同。如果宾语从句表示两种可能性居其一时，只能用whether（or not 可省略），不可用that。
e.g.They doubt whether the news is ture or not.
I wonder whether he knew the manager(or not).
如果宾语从句表示的是一种事实，不带有两种可能的性质，要用that。
I do not doubt that she will wait you.
Please see that he does the work well.
(徐广联，<<大学英语语法---讲座与测试>>，第一版，华东理工大学出版社，P603）

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There is no doubt中文翻译 there is no doubt that. there is no doubt that中doubt是什么词性 用There is no doubt that造句 there is no doubt whether和there is no doubt that 的区别? there is no doubt与 it is no wonder区别 there is no doubt itis no wonder 是固定搭配? it is no doubt 和there is no doubt 的用法区别 ti is no doubt that和there is no doubt that的区别 There is no doubt that Lily is a good student . it's no doubt 和there is no doubt 的区别 there is no doubt 后的that可省略吗 there is no doubt that you are foolish是什么意思 There is no doubt that he will come. there is no doubt+什么 ...一定是that? there is no doubt ___john will come by busAifBwhyCthatDhow there is no doubt that引导的是什么从句?如there is no doubt that he will come. No doubt it is.