1. Mary is not sleeping.-ls Mary sleeping? 2. You are not listening to the radio.-Are you listening the radio? 3. I am not studying.-am i studying? 4. You are not eating now.-Are you eating now? 5. We are not drinking coffee at the moment.-Are we drinking coffee at the moment?
Present Simple : 1) It runs in Moscow. 2) We swim in the swimming pool. Past Simple : 1) It run in Moscow. 2) We swam in the swimming pool. Future Simple : 1) It will run in Moscow. 2) We shall/will swim in the swimming pool. Present Continuous : 1) It is runing in Moscow. 2) We are swimming in the swimming pool. Present Perfect : 1) It has run in Moscow. 2) We have swum in the swimming pool.
16. She didn't go to the library three days ago. 17. How long have you known Bill? 18. Olga has always wanted to visit Great Britain. 19. Have you heard from Jack recently? 20. Mark Twain lived in the state of Missorui.