I used to live in Seattle.

我过去住在西雅图。

A: How about you? Where do you live?

A: 你呢，你住在哪里？

B: Now? Now, I live in Washington.  I've been there for 5 years.

B: 现在吗？现在，我住在华盛顿。我在那里已经住了5年了。

A: But you're not from Washington

A: 但是你不是华盛顿人

B: No.  I used to live in Seattle.  I worked there for a few years.

B: 不是。我过去住在西雅图。我在那里工作了几年。

A: And before that

A: 在那之前呢

B: Before that, San Francisco. I was born in San Francisco.

B: 在那之前，我在旧金山。我出生在旧金山。

1.  When you ask about something that started in the past but continues to the present time, you use the Present Perfect tense, e.g. I've been there for 5 years.
当你谈论在过去开始但是一直持续到现在的某事时，用现在完成时态，例如：I've been there for 5 years/我在那里已经5年了。

2.  If you are talking about something that is completely in the past，you use the Past Tense （sometimes called the Imperfect），e.g.： I used to live in Seattle /I worked there for a few years/ I was born in San Francisco.
如果所谈论的事情完全发生在过去，则用过去时态（有时也叫做未完成时态），例如：I used to live in Seattle /我过去住在西雅图。I worked there for a few years /我在那里工作了几年。；  I was born in San Francisco /我出生在旧金山。