1 They have learned French for two years.

2 My father has given up smoking for a year.

3 He has given up smoking for a year.

4 They have lived in HCMC since 2000.

5 He has learned how to play the piano since 2005.

6 How long have you learned English?

7 When did you start learning English?

8 How long is it since you first knew Maryam?

9 How long is it since people first used the telephone?

----- 

* S + started/began + to V/Ving + thời gian + ago

= S + have/has + V3/ed + for + khoảng thời gian

= S + have/has + V3/ed + since + thời gian

=> Đã làm gì được bao lâu

* How long + have/has + S + V3/ed?

= When did + S + start/begin + to V/Ving?

=> Bắt đầu làm gì từ khi nào?

* How long is it since + S + first + V2/ed?

= When did + S + first + V?

=> Lần đầu tiên làm gì là khi nào? 

$1$. They have learned French for 2 years.

$2$. My father has given up smoking for a year.

$3$. He has given up smoking for a year.

`***` give up V-ing (v): từ bỏ việc gì đó

$4$. They have lived in HCMC since 2000.

$5$. He has learned how to play the piano since 2005.

`***` learn how to do sth (v): học để làm gì đó

$6$. How long have you learned English?

$7$. When did you start learning English?

`***` start V-ing (v): bắt đầu làm gì đó

$8$. How long is it since you first knew Maryam?

$9$. How long is it since people first used the telephone?

________________________ _________________________

$-$ How long $+$ have/has $+$ S $+$ Ved/PTII..?

$-$ When $+$ did $+$ S $+$ start $+$ V-ing...?

$-$ How long $+$ tobe $+$ since $+$ S $+$ first $+$ Ved/ cột 2 $+$ O

`@` HTHT:

$-$ S $+$ have/has $+$ Ved/PTII $+$ O

$-$ S $+$ have/has $+$ NOT $+$ Ved/PTII $+$ O

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