| 1. …. has tried to do his best.Alan TuringWeThem
TheySteve Jobs and Bill Gates |
| 2. That boy and his friend …. their way.have losthas lostdo losthad lose
are lose |
| 3. Alan Kay has borrowed my notebook since …. .tomorrow
4 days5 monthsSunday3 hours |
| 4. He …. given it back yet.does nothas not have notdid not
do not |
| 5. Mr.Johnson has taught Computer for …. .last monthyesterdaytomorrow
1 yearslast year |
| 6. Have you seen this program …. ?yesterday
yetnowtomorrowjust |
| 7. Has Steve had lunch …. ?tomorrow
justnowlast nightalready |
| 8. Bill Gates …. breakfast already.have havehas hashas hadhas havehave had
|
| 9. Steve Jobs and Bill Gates …. washed the car yet.havehas notnot
not havehave not |
| 10. …. he given your smartphone back already ?AreIsHasHaveAm
|