usedverb

Examples

A great number of women used to die in childbirth.过去许多妇女死于分娩。
In those days people used to write a lot more letters.过去人们写信要多得多。
When I lived in Spain, I used to eat out all the time.我住在西班牙的时候，天天去外面吃饭。
He's rather shy, although he's not as bad as he used to be.他很腼腆，但是比以前要好一些了。
The apple pie was as good as the one my grandmother used to make.这苹果馅饼就像我奶奶以前做的一样好吃。

used to | American Dictionary

used to
modal verb
us/ˈjus·tu, -tə/
done or experienced in the past, but no longer done or experienced:
I used to eat meat, but now I’m a vegetarian.
We don’t go to the movies now as often as we used to.

Idiom