G5 USED TO & HAD TO
Mum / EAT / meat but now she eats vegetables.
Mum USED TO EAT meat but now she eats vegetables.
When Ben was a little boy, he / WALK / to school.
When Ben was a little boy, he USED TO WALK to school.
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.