`8.` I haven’t had such a delicious meal before.

`-` This is the first time + S + have/has + Ved/Vp2 + O

= S + have/has + not + Ved/Vp2 + O + before

`9.` The last time I saw him was 8 days ago.

`-` S + have/has + not + Ved/Vp2 + since/for

= The last time + S + Ved/V2 + was + time + ago

`10.` It’s Monday since I last took a bath.

`-` S + have/has + not + Ved/Vp2 + O + since/for

= It’s + time+ since+ S+ last+ V(ed/II)…

`11.` We have been learning English for five years.

`-` S + started/began + Ving + O + for/since

= S + have/has + been + Ving + for/since

`12.` I have been living in HCM city since I was 8.

`-` S + started/began + Ving + O + for/since

= S + have/has + been + Ving + for/since

`13.` She hasn’t seen her elder sister since 1999.

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

= S + have/has + not + Ved/Vp2 + since/for

`14.` They haven’t talked to each other for two months.

`-` S + last + Ved/V2 + time + ago ( lần cuối cùng làm gì )

= S + have/has + not + Ved/Vp2 + since/for

`15.`  The last time he wrote to me was in April.

`-` S + have/has + not + Ved/Vp2 + since/for

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