All, both: Quantifiers — Explanation

Practice All and Both quantifiers with B1 exercises. Improve grammar with interactive questions, answers, and clear explanations. Perfect for ESL learners.

All, Both: Quantifiers Exercises

Quantifiers help us talk about how much. All and both are two very common words that mean "a lot." They are used to talk about whole groups. At the B1 level, you need to know how to use them correctly with nouns, pronouns, and verbs.

This guide goes over the meaning, structure, and proper use of all and both, along with clear examples and common mistakes.

What does “All” mean?

We use "all" to talk about everything or everyone in a group of three or more.

Structure

All + plural noun
All + uncountable noun
All + of + determiner (the, my, these, etc.) + noun
All + object pronoun

Examples

• All students must complete the test.
• All water is important for life.
• All of the employees attended the meeting.
• All of them agreed with the decision.

Explanation

We say "all" when we mean 100% of a group. People, things, or objects can make up the group.

What does “Both” mean?

We use both to talk about two things or two people at the same time.

Structure

Both + plural noun
Both + of + determiner + noun
Both + object pronoun

Examples

• Both options are good.
• Both of the restaurants are expensive.
• Both of them live in London.

Explanation

We only use both when there are exactly two people or things in the group.

Using “All” and “Both” with “of”

We frequently utilize "of" in conjunction with a determiner (such as "the," "my," "these," etc.) or a pronoun.

Structure

All of the + plural noun
Both of the + plural noun

All of + pronoun
Both of + pronoun

Examples

• All of the books are new.
• Both of the cars are fast.
• All of us enjoyed the trip.
• Both of them work here.

Important Note

With pronouns, of is required:

Correct: Both of them are ready.
Incorrect: Both them are ready.

Position in the sentence

There are different places where all and both can be.

Before the main verb

• They both work in the same office.
• We all like this movie.

After the verb “to be”

• They are both tired.
• We are all happy.

With auxiliary verbs

• They have both finished the task.
• We will all attend the meeting.

Difference between “All” and “Both”

Quantifier	Number of items	Example
All	Three or more	All students passed the exam.
Both	Exactly two	Both students passed the exam.

Using “All” with uncountable nouns

We use all with nouns that can't be counted, but not both.

Correct:

• All information is useful.
• All money was spent.

Incorrect:

• Both information is useful.

“Information” and “money” are uncountable, so we use all.