1.They have studied English since they were in grade 3 2. We have chatted on the phone since it began to rain. 3. She has been doing housework since she got home. 4. he has worked as a teacher for 20 years 5. Mik chữa bt ạ 6. My father has worked as an engineer since he was 22. 7.He has worked as a teacher for 6 months 8. Samuel has kept a diary since 1997. 9.We have learned English for fìve years. 10.I have lived in Ho Chi Minh City since I was 8. 11.She has driven for 1 month. 12.We have eaten since it started to rain. 13.It has been raining since 2 o’clock 14. It's 8 years since she learnt English. 15.I started to learn English four years ago 16. ly's father has not smoked since last year Ok nhé bn