Does the one who prays Witr alone recite the supplication in the qunut in the singular, or does he say it in the plural form?

Question:
He asks about the supplication in the qunut: Does he say, "O Allah, guide us, as You have guided," always?

Answer:
We say: No. If they are a congregation praying behind him, he says, "O Allah, guide us," using the plural pronoun. If he is alone, he says, "O Allah, guide me, as You have guided," using the singular form of the supplication. If it is for himself alone, he uses the singular form of the supplication. If it is for himself and the followers, he uses the plural pronoun: "O Allah, guide us, as You have guided, and heal us, as You have healed," and so on.