as a determiner (followed by an uncountable or plural noun): They had given up all hope. ♦ All children deserve encouragement.
as a predeterminer (followed by a word such as ‘the’, ‘this’, or ‘his’): I want to hear all the details. ♦ We lost all our money.
as a pronoun: All was quiet in the street outside. (before a relative clause): ♦ I’ve done all that I can to help her. (followed by of): ♦ I want to invite all of you. (after the subject of a sentence): ♦ These buildings all belong to the college. (following the pronoun object of a sentence): ♦ Pauline said goodbye to them all. (after a modal or auxiliary verb or the verb ‘to be’): ♦ We can all relax. ♦ The tickets had all been sold.
as an adverb (before an adjective, adverb, preposition, or conjunction): Bernard was all alone in a strange city. ♦ They forgot all about everything else.