7 How long have you had it?

- When did + S + V-inf?

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

8 I haven't had such a delicious meal before.

- This is the first time + S + Ved/ V2 + O

-> S + have/has + not + PII + O + before

9 The last time I saw him was 8 days ago.

- S + have/has + not + PII + for + khoảng time

-> The last time + S + V2/ed + O + was + khoảng time + ago

10 It is Monday since I last took a bath.

- S + have/has + not + PII + since + mốc time

-> It is + mốc time + since + S + last + V2/ed

11 Samual has kept a diary since 1997

- S + started/ began + V-ing/ to V + in + mốc time

->S + have/has + PII + since + mốc time

12 We have learnt English for five years

- S + started/ began + V-ing/ to V + khoảng time + ago

- S + have/has + PII + for + khoảng time

Các công thức đổi HTHT - QKĐ

Structure 1: 

S + has/have + not + V3/ed + for/since + time 

--> S + last + V2/ed 

--> The last time + S+ V2/ed + was + time 

--> It is / has been + time + since + S+ (last) + V2/ed 

Structure 2: 

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

--> When + did + S + V1?

--> How long is it + since + S+ V2/ed ?

Structure 3:

S + has/have + V3/ed + for/since + time 

--> S + started / began + to V / Ving 

--> It is / has been + time + since + S+ V2/ed 

Structure 4: 

S + has/have + not/never + V3/ed + ... before

--> This/It is the first time + S+ has/have+ V3/ed

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7. How long have you had it?

8. I haven't had such a delicious meal before.

9. The last time I saw him was 8 days ago.

10. It is Monday since I last took a bath.

11. Samuel has kept a diary since 1997.

12. We have learnt English for five years.

`color{orange}{~MiaMB~}`