为你解答。
1、我从没听说过他讲的这个故事。(as引导定语从句)
I have never heard about the story as he told.
2、他有三个儿子,两个出国了。(定语从句)
He has three sons, two of which have been abroad.
3、没什么好担心的。(定语从句)
There's nothing we should worry about.
I never heard this story as he talked about.
He has three sons two of which have been abroad.
There is not anything that is to be worried about.
I've never heard a story as he talked.
He had three sons , two of which abroad.
There is nothing that i am worry about.
I never heard him speak of the story