1,否定句：HIs father doesn't have two offices.
疑问句：Does his father have two offices?Yes,he does/No,he doesn't
2,否定句：Mike doesn't usually do his homework after school.
疑问句：Does Mike usually do his homework after school?Yes,he does/No,he doesn't.
3,否定句：The students don't like helping the old man.
疑问句：Do the students like helping the lod man?Yes,they do/No,they don't.