`1.` The last time I went to the zoo was a year ago. 

`-` S + have/has + not + V3/ed + for + time

`->` The last time + S + V2/ed + was + time + ago 

`2.` I haven't really enjoyed myself since your farewell party.

`-` Time + was + the last time + S + V2/ed

`->` S + haven't/hasn't + V3/ed + since + time

`3.` This is the first time I have lived in a luxurious building.

`-` S + haven't/hasn't + V3/ed + before

`->` This is the first time + S + have/has + V3/ed

`4.` Tom has been to England since last Sunday.

`-` DHNB: since last Sunday

`->` Thì HTHT: `(+)` S + have/has + V3/ed

`5.` I haven't gone swimming since I was 10. 

`-` The last time + S + V2/ed + was + when + QKĐ

`->` S + have/has + not + V3/ed + since + QKĐ

`1,` The last time I went to the zoo was over a year ago

- The last time + S + Ved/V2 + was + time

= S + has/have + not + Vpp + for/since + tume

- be to + địa điểm = go to + địa điểm 

`2,` I haven't enjoyed myself since your farewell party.

- the last time : lần cuối cùng

- S + has/have + not + Vpp + O + for/since + time

`3,` This is the first time I have lived in a luxurious building.

- This is the first time + S + has/have + Vpp + O

= S + has/have + not/never + Vpp + O + before

`4,` Tom has been in England since last Sunday.

- Thì HTHT - diễn tả 1 sự việc xảy ra trong quá khứ , kéo dài đến hiện tại và có thể tiếp tục trong tương lai.

- Cấu trúc : S + has/have + Vpp + O

`5,` I haven't gone swimming since I was 10.

- The last time + S + Ved/V2 + was + time

= S + has/have + not + Vpp + for/since + tume