làm từ câu 7 đến câu 11. nhanh nhất = tim + hn+5s

7. How long has Sally had her puppy? 

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

$\leftrightarrow$ When + did + S + Vinf

8. The last time he jogged was a week ago.

- S + have/has not + PII + for + khoảng thời gian

$\leftrightarrow$ The last time + S + V2 + was + khoảng thời gian

9. They only switched off the TV when the film ended - Not do sth until.. $\leftrightarrow$ Only do it when...

10. Lucy has been preparing dinner for an hour

- S + started/began + Ving + khoảng thời gian + ago

$\leftrightarrow$ S + have/has + (been)  Ving/PII + for + khoảng thời gian

11. I haven't seen her since the 13th of July - Tương tự câu 8.