Определите время
1) to be(am,is,are) + V3
2) had + V3
3) to have + V3

Biking is very useful. but people are not always willing to take the bike in the hands of a number of reasons. one reason - the lack of bicycle lanes. let's examine the pros and cons of cycling and construction of bicycle paths. plus very much. to begin with, a useful exercise, without much effort. secondly, do not pay money for travel, petrol. thirdly, it is very eco-friendly transport. you do not bring any harm to the natural environment and people. and finally, you are simply brilliant and worthy of respect. nevertheless there are disadvantages. to begin with, the majority of roads in our country is not the place for bike lanes. secondly, need money. and finally, the high gas content of the streets. all things considered, i think that is a very good and useful idea. she has more pluses than minuses. i believe that in the future bicycle paths will be an integral part of the road. a bicycle will be an important part of our lives.

1. We  have taken  (to take) a lot of pictures for our album this year.
2. He  has left (to leave) for London, we won't see him for a month.
3. I have read  (to read) this story twice; it's very interesting.
4. The weather has changed  (to change) greatly; it's so cold now.
5. We  have bought (to buy) Granny a nice present for her birthday. We think she will like it.
6. It  will be (to be) very warm in Yerevan this week.
7. Where's the picture? I have given (to give) it to Bob.
8. Jane isn't at home now. She  has gone  (to go) to the playground.
9. They  have done (to do) all their work. They are free to play now.
10. Look! Somebody  is breaking (to break) the window.