Pill és írom a válaszokat.

4. She asked me who that beautiful woman was.
vagy
She asked me who that beautiful woman had been.
Mindkettő helyes.
5. She asked me how my mother was.
6. She asked me what I was going to do at the weekend.
7. She asked me where I would live after graduation.
8. She asked me what I had been doing when she had seen me.
vagy
She asked me what I had been doing when she saw me.
mindkettő OK
9. She asked me how my journey was. / She asked me how my journey had been.
10. She asked me how often I went to the cinema.
11. She asked me if I lived in London.
12. She asked me if I arrived on time.
13. She asked me if I had been to Paris.
14. She asked me if I could help her.
15. She asked me if I was working that night.
16. She asked me if I would go/come later. (Az ige attól függ, hol van épp a beszélő a helyszínhez képest.)
17. She asked me if I liked coffee.
18. She asked me if that was the road to the station.
19. She asked me if I did my homework.
vagy
She asked me if I had done my homework.
mindkettő OK
20. She asked me if I had studied reported speech before/previously.

a) A direct speech igéje 'eggyel múltabba' kerül. A Simple Past maradhat vagy mehet Past Perfect-be.
b) Az időhatározók változnak.
c) A névmások változnak.
d) A 'She/he asked' után jön a kérdőszó, majd egyenes szórend.
Eldöntendő kérdésnél 'She asked if', aztán a mondat egyenes szórenddel.