${22.}$ Mary said she couldn't come to the party the following day.

${23.}$ Tam asked if there was a post office nearly.

${24.}$ I asked Minh where his mother lived.

${25.}$ She asked me how he travelled to work.

Câu gián tiếp:

+) Dạng trần thuật: S + said/ told sb/ said to sb + (that) + S + V(lùi thì)

+) Dạng câu hỏi yes/no ( câu 23): S + asked +(O)/wanted to know/ wondered + if/whether + S + V(lùi thì)

+) Dạng câu hỏi wh/h ( 2 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