John seldom plays basketball with his friends after school.
or
John does not often play basketball
你的原句中play的后面少了s.1.he usually does his housework at night.2.there is some coffee in those cups.这两句怎么改为否定？he usually does his housework at night.he does not often do his housework at night.2.there is some coffee in those cups.there is not any coffee in those cups.