In Modal verbs^x, Tenses^x, Direct speech^x

We might not have the same edition. In my case, it's Swan 482, reporting (3), advanced points, item 5, modal verbs in indirect speech on page 505

As per Swan, must is usually unchanged in indirect speech after past reporting verbs: -- Direct: It must be really late. I really must go. Indirect: She said it must be pretty late and she really must go. Swan , reporting (3), advanced points, modal verbs in indirect speech --...

Paco: Sounds your books are telling merely that some native speakers don't do always the tense backshift in direct-to-indirect speech conversion. But I don't take it as that those books are saying ESL students always have to follow that kind of speech made by grammatically illiterate native...

If we use passive voice, we don't have to change it in reported speech. Am I right? JTT: That's right. Sounds your books are telling merely that some native speakers don't do always the tense backshift in direct-to-indirect speech conversion. But I don't take it as that those books are...

CGEL: Conversion to indirect reported speech not a matter of grammatical rule There is a second respect in which we must beware of being misled by the traditonal account associating backshift with indirect reported speech. Converting into indirect reprted speech, however, is not a matter...