Ex. 4. Use one of the following tense forms: Present Indefinite, Present Continuous, Present Perfect, Present Perfect Continuous:
1. This man (to be) a writer. He (to write) books. He (to write) books
since he was a young man. He already (to write) eight books.
2. What you (to do) here since morning?
3. Lena is a very good girl. She always (to help) her mother about the
house. She (to help) her mother since morning. They already (to wash) the
floor and (to dust) the furniture. Now they (to cook) dinner together.
4. He (to run) now. He (to run) for ten minutes without any rest.
5. Where he (to be) now? He (to play) volleyball with his friends. They
(to play) since breakfast time.
6. I (to live) in St. Petersburg. I (to live) in St. Petersburg since 1990.
7. This is the factory where my father (to work). He (to work) here for
fifteen years.
8. You (to find) your notebook? - No! I still (to look) for it. I already
(to look) for it for two hours, but (not to find) it.
9. You (to play) with a ball for three hours already. Go home and do
your homework.
10. Wake up! You (to sleep) for ten hours already

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