they had to walk there,hadn't they?怎么改 he had better stay here,doesn't he?怎么改

问题描述:

they had to walk there,hadn't they?怎么改 he had better stay here,doesn't he?怎么改

hadn't they 改成 didn't they
doesn't he 改成 hadn't he

第一个改为didn't they?
第二个改为hadn't he?

They had to walk there,didn't they?
He had better stay here,isn't it?