Cần nhanh nhất có thể ạ

1 We haven't eaten out since our mom's birthday.

- eat - ate - eaten (v) : ăn

2 How long have you lived here?

3 Have you ever been to Russia?

- be - was/were - been 

4 She hasn't met (her) kids since Christmas.

- meet - met - met (v) : gặp 

5 Have they repaired the lamps yet?

* Thì Hiện Tại Hoàn Thành:

+) S + has/have + Vpp + O

-) S + has/have + not + Vpp + O

?) Has/have + S + Vpp + O ? 

* Dấu hiệu : since , for , yet , just , never , ever , already , lately , up to now , so far , before , ...