1. I last met my best friend when I was 18 years old

2. The last time my children took the supermarket when they were in grade 5

3. How long have you waited for the train ?

4. They studied Spanish and Chinese for 5 years

5. It's five months since my younger sister last had her hair cut

6. This is the first time my friend has seen such a beautiful girl in his life

7. The last time John played the piano was in 2015

8. It's the first time we have met such a kind person

9. Is this the first time you have travelled to Thailand

10. I have not seen my father for 10 years

11. How long have you learnt Vietnamese

12. I have not gone to the cinema with my friends for nearly 8 months

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=> Cấu trúc viết lại câu giữa thì HTHT và QKĐ

Cấu trúc 1: This is the first time/It's the first time + S + have/has + V(cột 3) + O

- S + have/has + never + V(cột 3) + before

- S + haven't/hasn't + V(cột 3) + before

Cấu trúc 2: S + started/began + V-ing + KTG ago

                                                              + when MTG

                                                              + when + S + V(cột 2)

- S + have/has + V(cột 3) + for KTG

                                         + since MTG

                                          + since + S + V(cột 2)

Cấu trúc 3: The last time + S + V(cột 2) + was + KTG + ago

                                                               + when + S + V(cột 2)

                                                               + was + in năm

- S + (last) + V(cột 2) + KTG + ago

                                    + when + S + V(cột 2)

                                    + was + in năm

- S + haven't/hasn't + V(cột 3) + for KTG

                                                  + since + S + V(cột 2)

                                                  + since + MTG

Cấu trúc 4: How long + have/has + S + V(cột 3)

- When + did + S + start/begin + V-ing