Answer:
I stopped corresponding with Ben a long time ago
→ I haven't corresponded with ben since long time
7. It’s almost 3 months since I last played badminton.
→ I haven’t played badminton since 3 months
8. Her sister didn’t meet her cousin a few years ago.
→ Her sister hasn't met her cousin since few years
9. I didn’t live in Tra Vinh when I was eight years old.
→ I haven’t lived in Tra Vinh when I was eight
10. We last talked to our form teacher three months ago.
→ We have not talked to our form teacher for three months
11. My brother stopped smoking four weeks ago.
→ My brother hasn’t smoking since four weeks
12. My teacher hasn’t talked to us since we left school.
→ My teacher last talked to us when we were leaving the school
13. My father hasn’t planted trees in the garden for two months.
→ My father stopped planting tress in garden from 2 months
14. I have not visited Uncle Tri since 2005.
→ I last visited uncle tri in 2005
15. She hasn’t written to John since August.
→ She stopped writing to john from august
16. They stopped producing this kind of toy a long time ago.
ïƒ They haven’t produced these kinds of toys from years
17 . We last saw Mary when we left university.
ïƒ We haven’t seen Mary since we left university
18. I last travelled by plane a year ago.
→ I haven’t travelled by plane from year now
19. We stopped communicating with each other by radio a long time ago.
ïƒ We haven’ t communicated with each other by radio since long time
20. You last helped me when you graduated from college.
ïƒ You haven’t helped me from when you were graduated from college
