Bài 1.

1. I could help you

2. the weather was better today

3. he could pass the examination

4. she didn't go to class late today

5. your mom would come tomorrow

6. she helped her with the housework

7. I had enough money to help you

Bài 2.

1. to go to Vung Tau at weekends

2. to smoke

3. to be two chairs in the bedroom

4. to walk to school (when I was young)

5. to work for this company for a year

6. to come to class late

7. a visit to Ho Chi Minh City last month

Bài 3.

1. have been

2. is enjoying / is praying

3. to come

4. took

5. had

6. to study

7. getting

Transformtion

1. I could help you

2. the weather was better today

3. he could pass the examination

4. she did not go to class late today

5. your mom would come tomorrow

6. she helped her with the housework

7. I had enough money to help you

USED TO + V

1. to go to Vung Tau at weekends

2. to smoke

3. to be two chairs in the bedroom

4. to walk to school

5. to work for this company

6. to come to class late

7. a visit to Ho Chi Minh City last month

VERB FORMS AND TENSES

1. have been

2. is enjoying - is praying hoặc was enjoying - was praying

3. to come

4. took

5. had

6. to study

7. getting