12. Mum said that she was doing the washing up then

13. My friend asked me if I could lend her some money

14. Aunt Helen said to us that she had bought her car the week before 

15. Our neighbour warned us not to go to that old house alone

16. The doctor advise me to stay in bed all day

17. Dad said that it was colder that day than the day before

18. She said to me that she read a book every week

19. He asked me if I spoke any foreign languages

20. The boys asked the girls if they had ever seen a ghost

*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

*Lùi thì:

QKĐ → QKHT

HTĐ → QKĐ

HTHT → QKHT

HTTD → QKTD

QKTD → QKHTTD

HTHTTD → QKHTTD

will → would

can → could

may → might 

must → had to

shall → should

be going to → was/ were going to