1. поставьте глаголы в следующих предложениях в утвердительную, вопросительную и отрицательную формы present simple. 1. i (to do) morning exercises. 2. he (to work) at a factory. 3. she (to sleep) after dinner. 4. we (to work) part-time. 5. they (to drink) tea every day. 6. mike (to be) a student. 7. helen (to have) a car. 8. you (to be) a good friend. 9. you (to be) good friends. 10. it (to be) difficult to remember everything.

1. i do exercises// do i exercises? // i don't do exercises 2. he works at a factory // does he work at a factory? // he doesn't  work at a factory 3.  she   sleeps after dinner // does she   sleep after dinner  ? ? // she doesn't    sleep after dinner  4. we work part-time. // do we work part-time? // we don't work part-time 5. the y drink tea every day // do they drink tea every day? ? // they don't drink tea every day 6. mike is a student// is mike a student? ? // mike isn't a  student 7. helen has a car // has helen a car? // helen hasn't a car 8.  you are  a good friend // are you a good friend? // you aren't a good friend9.  you are      good friends // are you   good friends? // you aren't   good friends 10.  it is difficult to remember everything.// is it  difficult to remember everything? // it isn't  difficult to remember everything.

1) knows 2) is listening 3) have been studying 4) is having