there is no doubt 后面不可以跟to do 或doing,其固定用法如下:
1.There is no doubt that ...,即后面接that子句,如:
There is no doubt that she will keep her word.
毫无疑问她会遵守诺言的.
2.There is no doubt about sth.
There is no doubt about his innocence.
他完全是无辜的。
3.There is no doubt with sth.
There is no doubt with his faithness.
他的忠诚无可置疑。
4.There is no doubt as to ...
There is no doubt as to what he said.
有关他所说的话是不容置疑的。
5.There is no doubt of sth.
There is no doubt of it.
毫无疑问。
6.There is no doubt in ...
There is no doubt in his honesty.
他的诚实是无庸置疑的。
7.单独作插入语,如:
"There is no doubt, he is out.
“毫无疑问，他被排除了。”