When he was young, Grandpa Bill / BE / a firefighter.
When he was young, Grandpa Bill USED TO BE a firefighter.
What did the police officer have to do?
He HAD TO ARREST criminals.
When Ben was a little boy, he / WALK / to school.
When Ben was a little boy, he USED TO WALK to school.
Mum / EAT / meat but now she eats vegetables.
Mum USED TO EAT meat but now she eats vegetables.
What did Ricky have to do?
He HAD TO GO to the doctor.
What did Ron have to do in Hogwarts?
Ron HAD TO DO magic.
What did Bart have to do?
Bart HAD TO STUDY maths.
What did the astronauts have to do?
They HAD TO VISIT other planets / FLY to the moon.
What did the mechanic have to do?
He HAD TO REPAIR cars.
Kelly / NOT HAVE / blonde hair when she was 10 but now she does.
Kelly DIDN'T USE TO HAVE blonde hair when she was 10 but now she does.
you / GO / to the mountains when you were little?
DID you USE TO GO to the mountains when you were little?
My grandpa / LIVE / in Jamaica when he was a young man.
My grandpa USED TO LIVE in Jamaica when he was a young man.