39, Czasowniki w nawiasach wstaw w forme czasu PRESENT PERFECT CONTINIOUS lub PRESENT PERFECT:
1.We (solve) mathematical problems for two hours. So far we (solve) six.
2.i (run) for ten minutes. so far i (cover) three kilometres.
3.you (work) too hard, Bob. that is why you are so tired.
4.jane (eat) two bars of chocolate. She is not hungry anymore.
5. jane (eat) chocolate. That is why her lips are brown.
6."what(you do)" "i (paint) the windows." "how many (you paint) so far?" "i (paint)six"
7. i (wash) up. that is why my hands are wet.
8. she is crying because she (cut)onions for the last ten minutes.
9. i (read) this book for two days. so far i (read) three hundret pages.
10.i (write) this letter for about twenty minutes. so far i (write) three pages.
11.we (study)very hard this term.
12.i (hear) from him guite regularlysince he left poland.
13. brian looks very sad. what (happen)?
14. my grandmother (be) in hospital for three weeks.
15.i (know) Petr for guite a long time but only recently. i (find) out what a decent and honest man he is.
16. i (use) this lawn-mower for seven years and so far it (never break) down.
17.i (work) in the garden for two hours, that's why everything is so tidy there.
18.i (work) in the garden for two hours, that's why i need a rest.
19.we (have) a lot of problems with our son since he went to school.
20.my wife (look) for an exciting and a very well-paid job. so far she (not find) one which would meet her expectations.
1. have been solving, have solved
2. have been running, have run
3. have been working
4. has eaten
5. has been eating
6. have you been doing, have been painting, have you painted, have painted
7. have been washing
8. has been cutting
9. have been reading, have read
10. have been writing, have written
11. have studied
12. have been hearing
13. has happened
14. has been
15. have known, have found
16. have been using, has never broken
17. have worked
18. have been working
19. have been having
20. has been looking, hasn't found