Dưới đây là các câu được viết lại mà không thay đổi nghĩa:

1. **It has been a year since she started her new job.**
→ **She has been in her new job for a year.**

2. **It's the first time they have visited the museum.**
→ **They haven't visited the museum before.**

3. **She began studying ballet when she was five.**
→ **She has studied ballet since she was five.**

4. **The last time she saw her parents was a long time ago.**
→ **She hasn't seen her parents for a long time.**

5. **When did you last phone her?**
→ **How long is it since you last phoned her?**

6. **Have you ever climbed a mountain?**
→ **Is this your first time climbing a mountain?**

7. **I started reading the book last night.**
→ **I have just started reading the book.**

8. **This is the first time she has eaten a frog hotpot.**
→ **She has never eaten a frog hotpot before.**

9. **He started working as a teacher 30 years ago.**
→ **He has been working as a teacher for 30 years.**

10. **Is this your first visit to Vietnam?**
→ **Haven't you been to Vietnam before?**

11. **He last sent me postcards when he was in France.**
→ **The last time he sent me postcards was when he was in France.**

12. **She began writing the report 45 minutes ago.**
→ **She has been writing the report for 45 minutes.**

13. **We knew each other when we were in grade 7.**
→ **We have known each other since grade 7.**

14. **This is the first time I have joined such a fantastic birthday party.**
→ **I haven't joined a birthday party as fantastic as this before.**

15. **This is the second time I have seen Harry Potter.**
→ **I have seen Harry Potter once before.**

16. **She moved to this city 6 months ago.**
→ **She has been living in this city for 6 months.**

17. **Have you done this before?**
→ **Is this the first time you have done this?**

18. **She has taught the children in S.O.S village for 2 years.**
→ **She started teaching the children in S.O.S village 2 years ago.**

19. **How long has it been since you bought this bicycle?**
→ **When did you buy this bicycle?**

20. **I last ate soup when I was in Vietnam.**
→ **I haven't eaten soup since I was in Vietnam.**

21. **He has never tried sushi before.**
→ **This is his first time trying sushi.**

22. **We began learning French two months ago.**
→ **We have been learning French for two months.**

23. **Is this the first time you have seen a shooting star?**
→ **Haven't you seen a shooting star before?**