imperfect tense

常见例句

Instead of considering the imperfect tense as a specific tense, consider it as a time reference.
我們最好不要將未完成式眡爲一具躰時式，而是眡之爲一蓡考性質的時間座標。
bccadets.org
If you are talking about something that is completely in the past, you use the Past Tense (sometimes called the Imperfect), e.g.
如果所談論的事情完全發生在過去，則用過去時態(有時也叫做未完成時態)，例如：I used to live in Seattle /我過去住在西雅圖。
edu.sina.com.cn
One thing you need to remember about the imperfect past tense—it is for activities that were ongoing or repeated; something you were doing in the past, or something you used to do.
你應該記住過去未完成式是指過去進行的或重複的動作，你在過去正在做的事或習慣的事。
blog.sina.com.cn