1. раскройте скобки в present perfect tense. запишите предложения полностью. while i (to copy) the exercise, my friends (to describe) a picture. 2. when we came in, the children (to clean) their desks. 3. we met her at the bus stop. she (to wait) for the bus. 4. some of the children (to ski) while other children (to skate). 5. everybody (to have) a lot of fun. 6. when we came the family (to get) everything ready for christmas. 7. bob and helen (to decorate) the christmas tree. 8. the girls (to feed) the birds in the garden while the boys (to make) a bird-house.

1) While I was copying the exercise, my friends have described a picture.
2) When we came in, the children have cleaned their desks.
3) We met her at the bus stop. She has been waiting for the bus.
4)  Some of the children have skied while other children were skating.
5) Everybody has had a lot of fun.
6) When we came the family have got everything ready for Christmas. 
7) Bob and Helen decorated the Christmas tree.
8)  The girls have fed the birds in the garden while the boys were making a bird-house.