Used to do تعليم الانجليزية

Learn English lesson: We use used to do to talk about the past. It is not a tense but it is like a tense. It is a special expression. We use the expression used to do for the past only.
Structure of Used to do

The structure is: subject auxiliary
did not main verb
use infinitive
+ I used to do.
- I did not use to do.
Did you use to do?
Use of Used to do

We use the used to do expression to talk about:
an activity that we did regularly in the past (like a habit)
a situation that was true in the past I used to smoke.

past present future

Look at these examples.the past the present
- She used to work in a shop. Now she works in a bank.
- He used to watch a lot of TV. Now he doesn't watch much TV.
- They used to be married. Now they are divorced.
- There used to be a cinema here. Now there is a supermarket here.
- I didn't use to go swimming. Now I go swimming.
- Did you use to smoke?