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. Today 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. What they________ (to do) now? – They ________ (to work) in the reading room. They________ (to work) there for three hours already. 6. Where he________ (to be) now? – He ________ (to be) in the garden. He ________ (to play) volleyball with his friends. They________ (to play) since breakfast time. 7. I ________ (to live) in St. Petersburg. ________ to live) in St. Petersburg since 1990. 8. This is the factory where my father ________ (to work). He________ (to work) here for fifteen years. 9. You________ (to find) your notebook? – No! I still________ (to look) for it for two hours, but ________ (not yet to find) it. 10. You ________ (to play) with a ball for three hours already. Go home and do your homework.