If I were you, I…

If I were you, I would choose another one.

如果我是你，我会选另一个。

  If I were you, I would have given up.

如果我是你，我早就放弃了。

If I were you, I wouldn’t worry about it.

如果我是你，我不会为此而担忧。

功能：这是虚拟语气中最常用的说法，要注意要用were，而不是was。