第1个回答 2013-09-18
Used to be: 以前是
This was used to be very easy. 这以前是非常容易的。
Didn't used to: 以前不(是)
I didn't used to have my own house. 我以前没有自己的房子。
Used to have: 曾经/以前有
We used to have plenty of time for study before every exam. 我们以前每次考试之前都有很多时间温习。
只有三个词组啊,那儿会有五个呢?
但还是希望会对你有帮助。