1 We have moved to this area for 10 years

-> Hiện tại hoàn thành : S + have/has + PII  + .......

2 How long have you seen Mary ?

-> Hiện tại hoàn thành : (How long) + have/has + S + PII + ....... ? 

3 My father hasn't smoked for years

-> Hiện tại hoàn thành : S + have/has + PII 

4 When did you teach at this school ? 

-> How long + have/has + S + PII ........ ?

= When + did + S + V + ......... ?

5 We started to learn English 4 years ago.

-> S + have/has + PII + .........

= S + started/began + to V/Ving + .........

6 Katy has bought her car for four years

-> Hiện tại hoàn thành : S + have/has + PII 

7 We have never been to Las Vegas before

-> It's (smb) first time .......

= S + have/has + never + PII .... before

8  Jimmy hasn’t seen his uncle since 2002.

Jimmy last saw his uncle was in 2002

-> S + have/has (not) + PII ......... since + mốc thời gian 

9 My aunt has moved to Korea for three months.

-> Hiện tại hoàn thành : S + have/has + PII

10 How long have you met your boyfriend ?

-> How long + have/has + S + PII ........ ?

= When + did + S + V + ......... ?

$1.$ We have moved to this area for 10 years.

- S + V (-ed/ bất quy tắc) + time + ago = S + have/ has + V3 + for + time.

$2.$ How long did you last see Mary?

- How long is it + since + S + last + V2 = How long ago did + S + V (Bare)>

$3.$ My father has stopped smoking for a year.

- S + V (-ed/ bất quy tắc) + time + ago = S + have/ has + V3 + for + time.

- stop + V-ing.

$4.$ When did you teach at this school?

- How long + have/ has + S + V3 = When did + S + V (Bare)?

$5.$ We started learning English 4 years ago.

- S + started + V-ing + time + ago.

$6.$ Katy has bought her car for four years.

- S + V (-ed/ bất quy tắc) + time + ago = S + have/ has + V3 + for + time.

$7.$ We have never been to Las Vegas before.

$8.$ Jimmy last saw his uncle in 2002.

$9.$ My aunt has moved to Korea for three months.

$10.$ How long ago did you meet your boyfriend?