Well, time to love you and leave you.
唉，我该走了，不想走也得走哇。
It would be a good idea to call before we leave.
我们出发之前打个电话是个好主意。
What time do you leave the house in the morning?
你早晨几点出门去上班？
You don't need to leave yet, do you?
你不必现在就走吧？
He told me to leave ─ or words to that effect.
他叫我离开，或诸如此类的话。