我们迟到是他的错：it was his fault we were late.这样说可以吗?

这样说好一些.
It was his fault for our being late.
或者
We were late because of his fault.中间加that可以吗？because of 前面不可以加that我只是说：it was his fault that we were late可以不……可以。类似 I am sorry that I am late.