Интересно было бы узнать. Упражнение 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 morning exercises. Do I do morning exercises? I don't do morning 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. They 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 friend.
9. 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.
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1 - did, 2 - worked, 3 - slept, 4 - worked, 5 - drank, 6 - was, 7 - had, 8 - were, 9 - were, 10 – was.