Закончите предложения, употребив Present Perfect. Объясните употребление данного медли.1.

Окончите предложения, употребив Present Perfect. Растолкуйте употребление данного медли.
1. Its cold in the room. (the window to be open for a long time). 2. Its warm. (the weather, to be fine, all week). 3. Peter is absent, (he, to be ill, for a week). 4. She cant show you the way there, (she, to be there, never). 5. He may go. (he, to do his homework). 6. I cant say anything about the film. (I, not to see it). 7. Lets go for a walk. (the rain, to stop). 8. She knows English well. (she, to live there). 9. Dont describe the place to me. I (to be there, myself). 10. I know him well. (we, to work together).