${18.}$ John asked (me) if I was going to Hanoi the following week/ the next week.

→ câu gián tiếp dạng câu hỏi yes/no: S + asked +(O)/wanted to know/ wondered + if/whether + 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 

18. John asked me if I was going to Hanoi next week

*Statement:

S + said + (that) + S + V

S + said + to + O + (that) + S + V

S + told + O + (that) + S + V

*Yes - No question: S + asked + (O) + if/ whether + S + V

*Wh - question: S asked + (O) + question word + S + V

*Commands: S + told/ asked + O + (not) + to V

*Requests: S + asked + O + to V

*Advice: S + advised + O + (not) + to V

                 S + advised + that + S + should +  V