* câu gián tiếp dạng câu hỏi yes/no: S + asked + (O) + if/wheter + S + V(lùi thì)
* 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
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${2.}$ Hang asked Nam if he liked sports.
${3.}$ She asked Nam if his sister and brother went to the same school.
${4.}$ She asked her mom if there were some oranges in the fridge.
${5.}$ He asked his friend if it would rain the following day.
${6.}$ Tam asked Peter if he had gone to Hue three years before.
${7.}$ Tuan asked Lan if Tam and Hoa were late for class.
${8.}$ She asked me if I could speak Chinese.
${9.}$ Tam asked Thu if she would be there for five days.
${10.}$ She asked Ba if he had been reading that book at 8 o'clock the period Sunday.
