`1`.She hasn't come back to her hometown for `4` years

`->` Thì HTHT ( PĐ ) : S + haven't / hasn't + VpII

`=>` He , She , It `+` hasn't

`->` For + Time : Bao lâu ( `1 , 3 , 5 , 6` )

`2`.He has worked as a bank clerk for `3` months

`->` S + started / began + V-ing / to V : Bắt đầu làm gì

`=>` S + have / has + VpII + for time / since timeline : Đã làm gì

`3`.We have flown to Singaport for `5` years

`->` Thì HTHT : S + have / has + VpII

`4`.I haven't had my hair cut since November

`->` S + last + Ved / V2 + time / timeline : Lần cuối làm gì

`=>` S + haven't / hasn't + VpII + for time / since timeline : Chưa làm gì ( `4 - 6` )

`5`.We haven't called each other for `5` months

`6`.We haven't met for a long time

`7`.How long have you had it ?

`->` When + did + S + V ? : Từ khi nào

`=>` How long + have + S + VpII ? : Bao lâu

`8`.I have never had such a delicious meal before

`->` S + have / has + never + VpII + ( such + a / an + adj + N ) + before

`=>` Chưa làm gì

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

`->` The last time + S + Ved / V2 + was + time

`=>` Lần cuối làm gì

`10`.It is Wednesday since I last took a bath

`->` It + is / has been + time / timeline + since + S + last + Ved / V2

`=>` Đã bao lâu / từ khi nào ... ai đó lần cuối làm gì

`\text{# TF}`

1. She hasn't come back to her hometown for 4 years.

=> Công thức: The last time + S + Ved/V2 ...+ was + time + ago

                     -> S + haven't/hasn't + Ved/V3 .....+ for + time

2. He has worked as a bank clerk for 3 months.

=> Công thức: S + started/began + to V/ V_ing ....+ time + ago

                     -> S + has/have + Ved/V3 ....+ for + time

3. We have flown to Singaport for 5 years.

=> Công thức: It's + time + since + S + (last) + Ved/V2

                     -> S + has/have + Ved/V3 ....+ for + time

4. I haven't had my hair cut since November.

=> Công thức: S + (last) + Ved/V2 ...+ in + time

                     -> S + hasn't/haven't+ Ved/V3 ....+ since + time

5. We haven't called each other for 5 months. (giống câu 1)

6. We haven't met for a long time. (giống câu 3)

7. How long have you had it? 

=> Công thức: When + did + S + V?

                    -> How long + have/has + S + Ved/V3?

8. I have never had such a delicious meal before.

=> Công thức: This is the first time + S + have/has + Ved/V3

                      -> S + have/has + never + Ved/V3 + before

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

=> Công thức: S + haven't/hasn't + Ved/V3 .....+ for + time

                     -> The last time + S + Ved/V2 ...+ was + time + ago

10. It is Wednesday since I took a bath.

=> Công thức: S + hasn't/haven't + Ved/V3 ....+ for + time

                     -> It's + time + since + S + (last) + Ved/V2