The document discusses things that people used to do in the past but no longer do, such as playing the piano, living in London, and going to the same school as a sister. It also mentions things people didn't used to do, like liking techno music, drinking coffee, having their own bedroom, eating certain foods, playing or speaking certain ways, wearing specific clothes, living in a place, or doing particular activities. The document contrasts actions people were accustomed to in the past with things they no longer do regularly using phrases with "used to" and "didn't use to".

3. used to
didn’t use to

4. I used to play the piano.
We used to live in London.
My sister used to go to my school.
My parents didn’t use to
like techno music.
I didn’t use to drink coffee.
I didn’t use to have my own
bedroom.

5. didn’t use to
speak
used to eat
used to go
used to speak
used to play
didn’t use to eat
didn’t use to play
didn’t use to
go

6. used to wear
used to be
didn’t use to do
used to live
didn’t use to eat
used to speak