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Tính từ dài : My school bag is more beautiful than your school bag.
tính từ dài : The skirt is cheaper than the jeans
Trạng từ ngắn: The rabbit runs faster than the turtle.
Trạng từ dài : We can travel more safely in the countryside than in the city

A bunch of roses has been given to her by him on Valentine's Day.

1. We don't have to get up early at the weekends.
2. I have to decide which job I want before the end of the week.
3. We don't have to take the bus into the city center. We can walk.
4. She has to open the shop at 9 o'clock every morning.
5. You have to talk quietly in the library.
6. You don't have to send the letter to him by post. I will see him tomorrow and I can give it to him then.
7. You don't have to explain it to me. I understand the problem.
8. We have to stop talking when the lesson starts.

Exercise1: Change thse sentences into positive or negative sentences, or a question to the instructions.
Ex: a, I was at home yesterday.(negative)
-> I wasn't at home yesterday.
b, Did he do the homework yesterday?(positive)
-> He did the homework yesterday
1. Lan saw this movie on Saturday.(negative)
-> Lan didn't see this movie on Saturday.
2. He did not go to school yesterday.(positive)
-> He went to school yesterday.
3. Did you like the food?(positive)
-> You liked the food.
4. They went to work by bus.(question)
-> Did they go to work by bus?
5. I met her 5 days ago.(negative)
->I didn't meet her 5 days ago.
6. Were you at home last night.(positive)
-> You were at home last night
7. She thought about it.(question)
-> Did she think about it?
8. They slept until 9 a.m yesterday.(question)
-> Did they sleep until 9 a.m yesterday?

Chuyển các câu sau sang bị động
1. The mechanic is repairing Judy’s car.
Ò………………Judy's car is being repaired by the mechanic……………………………………………
2. They are digging the hole on the wrong side of the road.
Ò……………The hole on the wrong side of the road is being diged………………………………………………
3. When is someone going to announce the results of the contest?
Ò……………When are the results of the contest going to be announced?………………………………………………
4. Look! Someone is feeding the seals.
Ò…………Look! The seals are being fed…………………………………………………
5. Is a student pilot flying that airplane?
Ò………………Is that airplane being flown by a student?……………………………………………
6. My father is painting our house.
Ò…………Our house is being painted…………………………………………………
7. Her mother is preparing the dinner in the kitchen.
Ò……………The dinner is being prepared in the kitchen by her mother………………………………………………
8. Her son’s absence is worrying her.
Ò………………She is being worried by her son's absence……………………………………………
9. They are fixing my car today.
Ò………………My car is being fixed today……………………………………………
10. The editor is selecting the news items at the moment.
Ò………………The news items are being selected by the editor at the moment……………………………………………