I found the letter long after he had gone away.

他走后很久我才发现了那封信。

youdao

I found his letter long after he had left.

他走了好久我才发现他的信。

youdao

We found the letter long after he had gone away.

他出去很久以后，我们才发现那封信。

youdao

We found the letter long after he had gone away.

他出去很久以后，我们才发现那封信。

youdao