Salma said to me, “Can you give me your pen ?”

Salma asked me if I could give her my pen.

Salma asked me if I can give me your pen.

Salma asked me can I give her my pen.

None of these

If the reporting verb is in the past tense, then the modals like can changes to could, will/shall change to would, have to changes to had to etc.

And if the sentence is interrogative, we use the reporting verbs – asked, enquired, etc.