The pronoun तू تو (tū) is the informal (intimate) pronoun, तुम تم (tum) is the familiar pronoun and आप آپ (āp) is the formal pronoun. The pronoun तू تو (tū) is grammatically singular while the pronouns तुम تم (tum) and आप آپ (āp) are grammatically plural. However, the plural pronouns are more commonly used as singular pronouns and to explicitly mark the plurality, words such as लोग لوگ (log) [people], सब سب (sab) [all], दोनों دونوں (donõ) [both], तीनों تینوں (tīnõ) [three] etc are added after the plural pronouns.[24]