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。

If you are talking about something that is completely in the past, you use the Past Tense (sometimes called the Imperfect), e.g.

youdao

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。

If you are talking about something that is completely in the past, you use the Past Tense (sometimes called the Imperfect), e.g.

youdao