"I did not sell this car"Mr long said.
→ Mr. Long said (that) he hadn't sold that car.
⇒ S + said/ told + O/ said to + O (that) + S + V(lùi thì): câu gián tiếp dạng trần thuật
* Một số thì của động từ lùi thì:
- HTĐ → QKĐ
- HTTD → QKTD
- HTHT → QKHT
- HTHTTD → QKHTTD
- QKĐ → QKHT
- QKTD → QKHTTD
- is/am/are going to → was/were going to
- can/ will/ shall/ may/ must + V0 → could/ would/ should/ might/ had to + V0