When we say all (of) the students, we're talking about a specific group of students. When you talk about all of one thing, you mean the whole thing. The whole number of (used in referring to individuals or particulars, taken collectively):
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How to use all in a sentence. Discover everything about the word all in english: We use all (of) the (with an article), when we're talking about a specific group of the noun.
Putting all of one's available resources into an effort:
The whole of (used in referring to quantity, extent, or duration). Being or representing the entire or total number, amount, or quantity. See examples of all used in a sentence. Every one (of), or the complete amount or number (of), or the whole (of):
Games staking all of one's chips, as in poker. When shakespeare writes, in as you like it, “ all the world's a stage,” he means the whole world. The governor mounted a halfhearted campaign for the presidency but didn't. The meaning of all is the whole amount, quantity, or extent of.
When 'all' refers to a group of people/things as a unified whole, it comes with a singular verb, but when 'all' refers to multiple groups.
When 'all' is a pronoun, it can come with both singular and plural nouns. The whole of (used in referring to quantity, extent, or duration):