There is no doubt 后面经常接that所带的同位语从句。例如:There is no doubt that we will be successful. 句子的意思是:毫无疑问我们会成功的。

There is no doubt that Mary is qualified for the job . 毫无疑问，玛丽有条件做这项工作。相似句型有:There is no wonder that...难怪灬