used to - используются, когда говорят о бывших действиях  I used to smoke when I was young and silly. I didn't use to go swimming when I was at school.

или состояниях.

I used to be shy at school.

would - только о действиях. I would often read a book in the evening.

I would/used to visit my aunt in the countryside every summer.

Nurlybek used to have long hair, now he has short hair.

My brother used to love going to cinema; now he prefers the theatre.