改错 Please turn these Chinese sentences in English,will you?

问题描述:

改错 Please turn these Chinese sentences in English,will you?
I didn't know there used to have a new train station there.
How long have you become an English teacher?
We haven't seen each other since many years.
The alone traveler found himself alone after he woke up.

I didn't know there used to be a new train station there.
How long have you been an English teacher?
We haven't seen each other for many years.
The alone traveler found himself lonely after he woke up.