1. have had (so far: HTHT)

2. has taught (for + khoảng thời gian: HTHT; Mr. Tan là S số ít nên ta dùng has)

3. haven't stopped (since + mốc thời gian: HTHT)

4. have found (1 hành động kéo dài từ Qk đến HT và vẫn đang diễn ra: HTHT)

5. hasn't seen

6. has broken (Someone là đại từ bất định nên ta coi là S số ít `->` dùng has)

7. haven't decided (yet: HTHT)

8. have already finished (already: HTHT)

9. hasn't played

10. have been (một hành động đã xảy ra nhiều lần trong QK đến HT: three times: HTHT)

1. have had

2. has tought

3. haven't stopped

4. have found

5. hasn't seen

6. has broken 

7. haven't decided

8. have already finished

9. hasn't played 

10. have been