If...then...else
[计] 如果...则...否则
🗣️ 情景例句
Dear Mr. Billet.
尊敬的比利先生。
The whole class is in a heated discussion.
全班同学正在热烈讨论。
That's right.we have to work out the final price.
是的，我们得把最后的价格敲定。