Question

I said to her," when did you see my father?"

Answer 1

the above sentence is in Direct speech. Converting it into indirect we get:

I asked her when did she see my father?

INDIRECT SPEECH:

we may report what was said without quoting the speaker's exact words. This is called indirect or reported speech.

USE OF INDIRECT SPEECH:

• it is impossible & tiring to convey an entire coversation in direct speech to anyone.
• avoid lengthy & confusing documentation.
• to bring in clarity &preciseness to the reporting.