Pretransition
预相变
🗣️ 情景例句
I'm a friend of Pete's.
我是Pete的朋友。
What platform does the train leave from?
这班车从哪个站台开出呢？
Yes, I have.I think that.I've hurt my back.
是啊，摔伤了。我想我把背摔坏了。