1.Her assignment has been done in the room since two o'clock.

2.I have learned how to dance since i was 10 years old.

3. After they had gone out, you came.

4.Why did she miss the train?

5. How far is it from my house to the market?

*S+Has/have+P2(HTHT)+O->S(o)+has/have been (been luôn xuất hiện khi chuyển sang bị động) +P2+by+O(s)

*nơi chốn +by+thời gian

*chuyển từ QKĐ ->HTHT: started->X ,when->sine(nếu là quãng time)/ for (nếu là khoảng time)

*After+QKHT(S+had+P2), QKĐ(S+V_ed)

*why là từ để hỏi vì sao

*how far :từ để hỏi về khoảng cách

1. Her assignment has been done in the room since two o'clock.

2. I have learned how to dance since i was 10 years old.

3. After they had gone out, you came.

4. Why did she miss the train?

5. How far is it from your house to the market?