1.My mother last went shopping for groceries one week ago -> My mother hasn't 2.John last went back to his hometown last moth -> John hasn't 3.This is the firt time they have had dinner together ->They have never 4.This is the firt time she has did the washing-up ->She has 5.Someone is cleaning the floor ->The floor 6.They organize a lot of outdoor activities for students ->A lot of

1. → My mother hasn't gone shopping for groceries for once week

S+haven't /hasn't +Ved /C3 +... Since /for +(time)

2. → John hasn't gone back to his hometown since last month

S+haven't /hasn't +Ved /C3+... Since/for +(time)

3. →They have never had dinner together before

S+ have/has +not/never +Ved/ C3+.. (before)

4. →She has never done the washing up before 

S+ have/has +not/never +Ved/ C3+.. (before)

5. The floor is being cleaned 

BĐ: HTTD:S+ be (am/are/is) +being+ Ves /C3+...+(by +O)

6. A lot of outdoor activities are organized for students 

BĐ :HTĐ: S+ be(am/are/is)+Ved/C3+...+(by+ O)

Cho tớ cin ctlhn nhé ^_^

Các công thức đổi HTHT - QKĐ

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 

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

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

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Công thức - bị động:

- Thì HTTD: S + am/is/are + being + V3/ed 

- Thì HTĐ: S + am/is/are + V3/ed 

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1. My mother hasn't gone shopping for groceries for one week.

2. John hasn't gone back to his hometown since last month.

3. They have never had dinner together before.

4. She has never done the washing-up before.

5. The floor is being cleaned.

6. A lot of outdoor activities are organized for students.

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