Does a person’s supplication for himself use the plural or the singular form?

Question:
He says: Honorable Shaykh, may Allah grant you success. In the qunut supplication, if I am praying alone, do I use the plural form?

Answer:
If you are praying alone, should the supplication be in the plural or the singular form? If the supplication is for you alone, use the singular form. But if you are supplicating for yourself and for the Muslims, use the plural form. Yes.