Dưới đây là các câu đã biến đổi nhưng vẫn giữ nguyên nghĩa:

21. We have learned English for 3 years.
→ We started learning English 3 years ago.

22. We started to live here in 2012.
→ We have lived here since 2012.

23. Her book is not the same as mine.
→ Her book is different from mine.

24. You should walk around the Old Quarter at night.
→ It’s a good idea to walk around the Old Quarter at night.