1.
- It is a month since I last watched TV.
- The last time I watched TV was a month ago.
- I last watched TV a month ago.
2.
- I last played soccer a week ago.
- The last time I played soccer was a week ago.
- I haven't played soccer for a week.
3.
- It is a year since he last drank wine.
- The last time he drank wine was a year ago.
- He hasn't drunk wine for a year.
-----
Giải thích:
- Cấu trúc: S+ last + V2+ khoảng thời gian+ ago
-> The last time+ S+ V2+ was + khoảng thời gian+ ago
-> It is + khoảng thời gian+ since + S+ last + V2
-> S+ has/ have + not + PII+ for + khoảng thời gian.