题目内容：

I doubt that I don't doubt whether
I doubt that 和I don't doubt whether
这两个句型对吧？

优质解答

doubt 有两种用法``
第一种用作名词```,若在肯定句中,则后接whether.若用在否定句中,则后接that``
还有一中用法就是做动词用``.和名词一样```若在肯定句中,则后接whether.若用在否定句中,则后接that.
以上``