Use all of before words like us, you, it, him, and her (i.e., pronouns). For example:
- All of us
- All the cheese
- All the soldiers
Using All and All OfThere is often confusion over all and all of. As a very general guideline, use all of when the next word is a pronoun (e.g., us, you, it, him, her). For example:
NOT A RULE BUT A GUIDELINE
The word all is used as either an indefinite adjective (e.g., all the soldiers) or an indefinite pronoun (e.g., all of the soldiers).
As indefinite adjectives are not generally used to modify pronouns, terms like all us are wrong. With nouns, however, you have a choice of constructions:
Using All Right or Alright
Take a test on All and All Of
What are pronouns?
What are indefinite adjectives?
What are indefinite pronouns?