以前我告诉过你，我打算和她结婚。

I have told you before that I intend to marry her.

youdao

如果我以前是你，我就不会和她结婚。（和过去情况相反）

If I had been you, I should not have married her.

youdao

如果我以前是你，我就不会和她结婚。（和过去情况相反）

If I had been you, I should not have married her.

youdao