No one doubts that it is ture 为什么that不能换成whether

问题描述:

No one doubts that it is ture 为什么that不能换成whether

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?(...