3.-> A cake is being baked by my sister.

Hiện tại tiếp diễn

1. The girls are singing a folk song.
-> A folk song is being sung by the girls.

2. Mr. Thompson and his son are playing table tennis at the moment.  
-> Table tennis is being played by Mr. Thompson and his son at the moment.

3. My sister is baking a cake.
-> A cake is being baked by my sister.

4. The waitress is serving three lunches now.  
-> Three lunches are being served by the waitress now.

5. My dad is reading the newspaper at this time.
-> The newspaper is being read by my dad at this time. 

6. They are selling cookies for Christmas right now.
-> Cookies are being sold for Christmas by them right now.

7. The dog is eating its snack.  
-> Its snack is being eaten by the dog.

8. I am weeping the floor.
-> The floor is being wept by me.

9. Anna is throwing the ball into a basket.
-> The ball is being thrown into a basket by Anna. 

10. Jimmy is choosing a present for his best friend's birthday.
-> A present is being chosen for his best friend's birthday by Jimmy.

Hiện tại hoàn thành

1. My mother has bought this bouquet of flower in that shop.
-> This bouquet of flower has been bought in that shop by my mother.

2. Jane has found her wallet.
-> Her wallet has been found by Jane.

3. Our team has finished the report.  
-> The report has been finished by our team.

4. I have finished my exercise for two days.
-> My exercise has been finished for two days by me.

5. He has never seen this movie before.
-> This movie has never been seen before by him. 

6. We have heard the news already.
-> The news has been heard already by us.

7. The employee has signed the contract.
-> The contract has been signed by the employee.

8. These boys have bought five concert tickets.
-> Five concert tickets have been bought by these boys.

9. His brother has studied computer science since April.
-> Computer science has been studied since April by his brother. 

10. My parents have taken care of my cat well.  
-> My cat has been taken care of well by my parents.

11. We have typed these reports for 1 hours.  
-> These reports have been typed for 1 hour by us.

12. The police has found the thief yesterday.
-> The thief has been found yesterday by the police.

Quá khứ đơn

1. People reconstructed the temple in 1903.
-> The temple was reconstructed in 1903.

2. Thousands of people visited Ho Chi Minh Mausoleum yesterday.
-> Ho Chi Minh Mausoleum was visited by thousands of people yesterday.

3. She didn't invite me to her birthday party. 
-> I wasn't invited to her birthday party.

4. People built the Khue Van Pavilion inside the Temple of Literature.
-> The Khue Van Pavilion was built inside the Temple of Literature. 

5. Why did many students visit the Temple of Literature last week?
-> Why was the Temple of Literature visited by many students last week?

6. I lost my key yesterday.  
-> My key was lost yesterday.

7. They didn't open the bank last weekend.
-> The bank wasn't opened last weekend. 

8. J. K. Rowling wrote her first book at the age of six.
-> J. K. Rowling's first book was written at the age of six.

9. Why didn't you clean the floor this morning?
-> Why wasn't the floor cleaned this morning?

10. The waiter brought the dish to us.
-> The dish was brought to us by the waiter.

Quá khứ tiếp diễn 

1. We were eating a bowl of Pho.
-> A bowl of Pho was being eaten.

2. She was writing a letter for her pen pal.
-> A letter was being written for her pen pal.

3. He was not playing chess in his room at 9 o'clock yesterday evening.
-> Chess was not being played in his room at 9 o'clock yesterday evening.

4. Mr. Tai was watching the television.
-> The television was being watched by Mr. Tai.

5. We were cleaning the floor when Ann called.
-> The floor was being cleaned when Ann called.

6. Jane was taking a photo of me.
-> A photo of me was being taken.

Quá khứ hoàn thành

1. I had ordered this dress before I went to bed last night.  
-> This dress had been ordered before I went to bed last night.

2. My brother had not washed the dishes.
-> The dishes had not been washed by my brother.

3. I had won an international letter-writing contest.
-> An international letter-writing contest had been won by me. 

4. Mary had done her exercise by 5 p.m.  
-> Her exercise had been done by 5 p.m.

5. The boys had not finished the report before going to school.
-> The report had not been finished before going to school.

6. They had seen this film before I called.
-> This film had been seen before I called.

7. After I had painted the wall, I went to a cinema.  
-> After the wall had been painted, I went to a cinema.

8. After Thomas had watched the television, he studied.
-> After the television had been watched, Thomas studied.

9. Had the girl ironed the clothes by afternoon?
-> Had the clothes been ironed by the girl by afternoon?

10. My little brother had brushed the teeth before he went to bed last night.  
-> The teeth had been brushed by my little brother before he went to bed last night.