Predual
预对偶
🗣️ 情景例句
Would you please tell us payment terms?
请您告诉我们付款方式好吗？
If I had known her telephone number, I would have called her.
如果我知道她的电话号码，我就给她打电话了。
Open the window and air the room.
打开窗子，给房间通通风。