21.she want to know if I was going by train

P/s:S+wanted to know+if/whether+S+V

22.she asked us not to use too much hot water.

P/s:S+ asked +O+(not)to+inf

23.She invited me to come to her party

P/s: S+invited+O+to inf

24.She told them not to do it again

P/s: S+told+O+(not)to+Vo

25.She asked me if Mr Brown sent the potatoes to you

P/s: câu tường thuật S1+asked+O+ if/whether+S+V

26.she told the boys not to get their shoes dirty

p/s don't chuyển sang not to, your ->their

Chúc bạn học tốt

Cho xin hay nhất ạ

21. She wanted to know if I were going by train

22. she asked us not to use too much hot water,

23. she invited me to her party

24. she told them not to do it again

25. She asked me if Mr Brown had sent the potatoes to me

26. She told the boys not to get their shoes dirty.

GIẢI THÍCH: 

câu reported speech: Khi động từ tường thuật ở dạng quá khứ, ta lùi thì của câu

Với dạng câu Yes/ No question.

- Dùng động từ tường thuật: asked/ inquired/ wondered/ wanted to know

- Sau động từ tường thuật dùng ‘if’ hoặc ‘whether’

- Đổi cấu trúc câu hỏi thành câu trần thuật

HỌC TÔT NHA!