${11.}$ The teacher told us we had to study hard for the test.
${12.}$ He said to her he had something to show her.
${13.}$ The doctor told me I didn't look after my dog properly.
${14.}$ The doctor said to him he had a cold.
${15.}$ She said to me she saw my children quite often.
${16.}$ The doctor said to her she couldn't go to work.
${17.}$ The doctor told him that he was too thin.
${18.}$ The doctor told me that I needed to stay in bed.
${19.}$ The doctor told him he didn't keep his flat warm enough.
${20.}$ The doctor told him he could phone him/her if he felt worse.
→ S + said/ told sb/ said to sb (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