I do morning exercises./i do not do morning exercises./do i do morning exercises?, he works at a factory./ he does not work at a factory./ does he work at a factory?, she sleeps after dinner./ she does not sleep after dinner./does she sleep after dinner?, we work part-time./we do not work part-time./do we work part-time?, they drink tea every day./ they do not drink tea every day./ do they drink tea every day?, Mike is a student./ Mike is not a student./ is Mike a student?, Helen has a car./Helen does not have a car./does Helen have a car?, you are a good friend/s. you are not a good friend/s.are you a good friend/s?, it is difficult to remember everything./ it is not difficult to remember everything./ is it difficult to remember everything?.