Раскрыть скобки 1. the teacher asked his students if hydrogen and oxygen (to combine) chemicallyand (to form) molecules of water.2. they (not to know) that some engineers already (to repair) the tubes which usually(to use) for experiments.3. some years ago my younger brother (not to know) if he (to enter) the institute ofphysics and techniques or the institute of priority technologies.4. the lecturer told us that i-pads, computers, laptops, wireless internet modems andsome other useful devices (to use) everywhere in the world nowadays.5. she (to ask) the lecturer when newton (to write) his famous book "the principia".ii. express the following sentences in the passive and translate them. ​

Паст прогрессив- действие, которое было в но происходило какое то продолжительное время , например: я читал книгу . i was reading a book
чаще всего добавляется ука3ание времени, в которое происходило действие, например : я читал книгу два часа. i was reading a book for two hours.

паст симп- действие, которое происходило в но происходило моментально, например: я 3акрыл дверь. i closed the door

т,е. книгу я читал два часа, а дверь просто в3ял и 3акрыл, это было моментальное и непродолжительное действие

1. They are still arguing. They have beeen arguing already for two hours.
2. She is still sleeping. She's been sleeping already for two hours.
3. She is still doing his homework. He has been doing his homework already for three hours.
4. The boys are still playing football. They have been playing football for fourty minutes already.
5. They girls are still changing. They've been changing already for half an hour.
6. She still learns Spanish. She has been learning Spanish already for two years.
7. They still live in the countryside. They have been living in the countryside already for four months.
8. She is still talking on the phone. She has been talking on the phone for twenty minutes already.
9. My brother is still solving this difficult task. He has been solving this task already for half an hour.
10. She is still writing a letter to her granny. She has been writing a letter to her granny already for an hour.
11. They are still catching the fish. They've been catching the fish already for five hours.
12. Grandparents are still playing lotto. They have been playing lotto already for two hours.
13. The actors are still rehearsing this scene. They have been rehearsing this scene already for three hours.
14. The children are still running in the yard. They have been running in the yard already for three hours.
15. He is still writing his new book. He has been writing his new book already for two years.
16. He is still learning Hamlet's soliloquy. He has been learning Hamlet's soliloquy already for two days.
17. We are still repairing our flat. We have been repairing our flat already for half a month.