${31.}$ Yesterday Jennifer asked me where I played football that day.

${32.}$ Yesterday Nancy asked me why Nick didn’t go to New York in summer.

${33.}$ Yesterday Barbara asked me if she had to do her homework that afternoon.

${34.}$ Yesterday Linda asked me if Max flew to London every 2 weeks.

${35.}$ Yesterday Grandmother asked me where her glasses were.

${36.}$ Yesterday a man asked me when the train to Liverpool left.

${37.}$ I asked Tom who would build that enormous bridge.

${38.}$ I asked Ba what Brazil was like.

${39.}$ Tim asked me if Benjamin Franklin wrote 'Poor Richard's Almanac'.

${40.}$ Bob asked Lan how she did it.

→ Câu gián tiếp:

+) Dạng câu hỏi yes/no ( câu 33, 34, 39 ): S + asked +(O)/wanted to know/ wondered + if/whether + S + V(lùi thì)

+) Dạng câu hỏi wh/h ( các câu còn lại ): S + asked +(O)/wanted to know/ wondered + wh/h + 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

* Cách biến đổi trạng từ chỉ thời gian và nơi chốn:

- today → that day

- tonight → that night

- tomorrow → the next day/the following day

- yesterday → the day before/ the previous day/ the period day

- ago → before

- now → then

- this → that

- these → those

- here → there