расскройте скобки, употребляя глаголы в форме Past Continuous.

Помогите пожалуйста со следующим заданием:

Перепишите следующие предложения; подчеркните в каждом из них глагол сказуемое и определите его временную форму и залог:
1. Scientist have been looking for the substance as a source of energy for many years.
2. Becquerel`s discovery was followed by the intensive research work of Marie and Pierre Curie.
3. New methods of obtaining polymers have been applied at our plant.
4. The lecturer is listened to with great interest.
Заранее спасибо!!

Past, Future Simple; Present, Past Continuous; Present, Past Perfect.

1. Mike (to cat) ice cream every day. Look, he (to eat) ice cream now. When I (to see) him in the morning, he (to eat) ice cream, too. He (to say) he (to eat) one ice cream already by that time. I think he (to fall) ill if he (to eat) so much ice cream. 2. They (to walk) along the street and (to talk). Suddenly Nick (to stop) and (to say): "Oh, what shall we do? I (to lose) the key to the door." "If you (not to find) it," said Pete, "we (to have) to wait for mother in the street," 3. When I (to come) to the station yesterday, I (to learn) that my train already (to leave).

4.What he (to do) when you (to see) him yesterday? I (to give) you this book as soon as I (to finish) reading it. 6. When the ship (to cross) the ocean, a great storm (to break) out.

Раскройте скобки, употребляя глаголы в одном из следующих времѐн:Present Simple, 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. 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. I (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. I already (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. 11. Wake up! You (to sleep) for ten hours already. 12.I (to wait) for a letter from my cousin for a month already, but (not yet to receive) it. 13. She already (to do) her homework for two hours; but she (not yet to do) half of it. 14. I (to wait) for you since two o'clock. 15. What you (to do)? –I (to read). I (to read) for two hours already. I already (to read) sixty pages. 16. It is difficult for me to speak about this opera as I (not to hear) it. 17.I just (to receive) a letter from my granny, but I (not yet to receive) any letters from my parents. 16. The weather (to be) fine today. The sun (to shine) ever since we got up.19. Every day I (to wind) up my watch at 10 o'clock in the evening. 20. Come along, Henry, what you (to do) now? I (to wait) for you a long time. 21. Where your gloves (to be)? — I (to put) them into my porcket. 22. I (to stay) with some American friends in Chicago. I (to stay) with them for two weeks now. I (to have) a great time here, I (to take) the opportunity to improve my English. I already (to see) the towering skyscrapers of Chicago which are reflected in the rippling water of Lake Michigan._I just (to take) a picture of Chicago's Sears Tower which (to rise) 1,707 feet and (to provide) a panoramic view from the skydeck. 23.I (to go) to give that cat some food. I (to be) sure it (to starve). — But Jane already (to feed) the cat. You needn't do it.