do you know the time when he left do you know the time when

Do you know when he left?这里为什么用left do you know the time lunch How do you know the time?回答 Do you know when the Greens will Do you know when the plane ()? Do you know when the world_______? Do you know when he was born Do you know when he came here? Do you know when he ( )Lucy? you don't happen to know the time,do you what will you do when you ______(know) the way Do you know when the train to leave?与Do you know the train w