1. They often go to school at nine.
否定句：They don't often go to school at nine.
一般疑问句：Do they often go to school at nine?
2. Mike usually runs after school
否定句：Mike doesn't usually run after school.
一般疑问句：Does Mike usually run after school?
1. They often go to school at nine.
否定句：They don't often go to school at nine.
一般疑问句：Do they often go to school at nine?
2. Mike usually runs after school
否定句：Mike doesn't usually run after school.
一般疑问句：Does Mike usually run after school?