要是她听他的建议就好了，他们就能避免争吵。

___If ___only she would listen to his advice, they could avoid the argument.

要是你提醒我就好了，我就不会忘记约会了。

___If ___only you had reminded me, I wouldn't have forgotten the appointment.

要是我们走捷径就好了，就能节省很多时间。

___If ___only we took the shortcut, we could save a lot of time.