1. She asked Nam if his sister and brother went to the same school.

→ S + asked + O + if/whether + S + V(lùi thì): câu gián tiếp dạng câu hỏi yes/no

2. Nam said (that) he was told to be at school before 7 o'clock.

→ S + said (that) + S + V(lùi thì)

3. Phong asked Peter if he enjoyed reading.

→ câu gián tiếp dạng câu hỏi yes/no

* Một số thì của động từ lùi thì:

- HTĐ → QKĐ

- HTTD → QKTD

- HTHT → QKHT

- HTHTTD → QKHTTD

- QKĐ → QKHT 

- QKTD → QKHTTD

- can/will/shall/may/must + V0 → could/would/should/might/had to + V0

1 She asked Nam if his sister and brother went to the same school.

2 Nam said he was told to be at school before 7 o'clock

3 Phong said to Peter if he enjoyed reading.

Cấu trúc

S + asked/said (+ O) + if/whether + S + V (lùi thì)