13. The old man asked me how I went to school.

→ S + asked + O + Wh/H + S + V(lùi thì): câu tường thuật dạng câu hỏi Wh/H ( lùi thì HTĐ → QKĐ )

14. This is a machine used to wash clothes.

→ rút gọn MĐQH ( bỏ 'which' và Vbe )

15. I am invited to the party.

→ câu bị động thì HTĐ: S +is/am/are + V3/ed +(by+O)

16. I have played piano for 2 years.

→ S + started/ began + to_V/V_ing + ... + time + ago: Lần đầu làm việc gì

    S + have/has + V3/ed + for + khoảng thời gian 

                                        + since + mốc thời gian

17. Huong said (that) she sometimes worked on Sundays.

→ S + said (that) + S + V(lùi thì) ( lùi thì HTĐ → QKĐ )

18. He was told to stay home for three days.

→ S + was/were + V3/ed + (by+O): câu bị động thì QKĐ

@ $quynhly$

- [...] how I went to school? (câu hỏi gián tiếp)

- [...] washing machine.

- [...] am invited to the party. (bị động)

- [...] played the piano for two years. (thì hiện tại hoàn thành)

- [...] that she sometimes worked on Sundays. (câu gián tiếp)

- [...] told to stay home for three days. (bị động)