S + have/has + not + v3/ed + O + for + khoảng tg => It is + time + since +S + last + V qk 1. It's 4 weeks since we last said goodbye => 2.He has not had his hair cut for 9 months. => 3.it's such a long time since he last stayed in that neighborhood => 4.It is 6 months since I last come home. => 5.She hasn't seen her mom for a long time. => 6.It is years since my teacher last taught in this area. => 7.They haven't sold that thing for 3 years => 8.Lan has not played Monopoly for a week. => 9. I have not painted this apartment for 3 days. => 10 It's an hour since they last talked to each other. => 11 We have not worked here for ages. =>

`1,` We haven't said goodbye for 4 weeks.

`2,` It's 9 months since he last had his hair cut.

`3,` He hasn't stayed in that neighborhood for a long time.

`4,` I haven't come home for 6 months.

`5,` It's a long time since she last saw her mom.

`6,` My teacher hasn't taught in this area for years.

`7,` It's 3 years since they last sold that thing.

`8,` It's a week since Lan last played Monopoly.

`9,` It's 3 days since I last painted this apartment.

`10,` They haven't talked to each other for an hour.

`11,` It's age since we last worked here.

`@` Cấu trúc:

- It's + time + since + S + Ved/V2 + O 

= S + has/have + not + Vpp + for + time

- for + khoảng thời gian 

- I/we/you/they/danh từ số nhiều + have

- He/she/it/danh từ số ít + has