I last went to Spain three years ago? -> It is -> The -> I haven't

=> It is 3 years since i last went to Spain

- Cấu trúc: It is + khoảng thời gian + since + S + last + Ved/Vc2 + ... 

=> The last time i went to Spain was 3 years ago

- Cấu trúc: The last time + S + Ved/Vc2 +. .. + was + khoảng thời gian + ago

=> I haven't gone to Spain for three years

- Cấu trúc: S + have/has+  (not) + Vpp + ...+  for + ktg