بهما

In a sentence

• يجب أن تتحدث بهما مع الأستاذ.

  You should speak with both of them to the teacher.

  The pronoun 'بـ' + 'هما' refers to 'both of them' as an object of the verb, combining 'بـ' (with) and 'هما' (both of them).

• لقد قرأت الكتابين وأعجبت بهما.

  I have read the two books and am impressed with both of them.

  Here, 'بـ' + 'هما' denotes the pronoun 'both of them', referring back to the previously mentioned dual subject, the books.

• هل تريد أن تذهب معهما إلى المكتبة؟

  Do you want to go with them to the library?

  'بـهما' is used here as an instrumental pronoun referring to 'them' (dual form), showing association with the action.