Answer:
The personal pronoun is in the object form: I need to speak to all of you for a few minutes. He brought gifts for all of us.
Step-by-step explanation:
"We use all" is a phrase that can be used in various contexts to indicate the entirety or completeness of something. However, you can use "all of" when you want to be more specific or emphasize the completeness of a particular group or set.
For example:
1. We use all our resources to solve the problem. (Indicates using all available resources in a general sense.)
2. We use all of the available resources to solve the problem. (Emphasizes using every single resource that is available.)
In both cases, "all" and "all of" convey a sense of completeness, but "all of" adds a bit of emphasis or specificity. The choice between them often depends on the desired nuance in the sentence.
OR
We use all of before personal pronouns (us, them), demonstrative pronouns (this, that, these, those) and relative pronouns (whom, which). The personal pronoun is in the object form: I need to speak to all of you for a few minutes. He brought gifts for all of us.