Dưới đây là các câu chuyển đổi nghĩa không đổi:

1. **Tom delivers the mail every day.**
→ The mail is delivered by Tom every day.

2. **The police didn’t find my lost suitcase.**
→ My lost suitcase was not found by the police.

3. **Someone broke into Mr. Smith’s house when they were out.**
→ Mr. Smith’s house was broken into while they were out.

4. **Fire destroyed that house.**
→ That house was destroyed by fire.

5. **The students attended the lecture.**
→ The lecture was attended by the students.

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### Bài 6:
1. **All the paintings are displayed by the painter in the gallery.**

2. **The kettle is turned off by Jim.**

3. **The door is always locked by Peter before 9 p.m.**

4. **Jim is taken to the airport.**

5. **How often is Jane cleaned?**

6. **A long essay is rarely written by my brother.**

7. **Flowers are beautifully arranged by my aunt.**

8. **The new car is sometimes driven by Mr. Smith to work.**

9. **English is never spoken by me outside the classroom.**

10. **The gate is never opened by people.**

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### Bài 7:
1. **A large number of people read this book.**

2. **The citizens warmly welcome the President.**

3. **You are invited to the party by Jim.**

4. **Many children love chocolate.**