Before I came to Beijing, I lived in Tianjin.
A How long have you lived in Beijing?
A 你在北京住多久了？
B I’ve been in Beijing for seven years.
B 我已经在北京住了七年了。
A So you’re not from Beijing?
A 那么你不是北京人了？
B No, before I came to Beijing, I lived in Tianjin. I was born there.
B 不是的，在来北京之前，我一直住在天津。我是在那里出生的。
当你在说关于过去发生的事，或者你的出生地，出生日期时，你要用过去时态，例如:
I was born in Tianjin / 我是在天津出生的。
I was born in 1977 / 我出生于1977年。 

练习：
I lived in Shanghai.
I was born in 1988.
I went to university in Beijing.
I worked in Tianjin.
 
我过去住在上海。
我是在1988年出生的。
我是在北京上的大学。
我过去在天津工作。