❌ A number of students is waiting.
✅ A number of students are waiting.
❌ The number of students are increasing.
✅ The number of students is increasing.
A number of and the number of are both correct, but they do not work the same way. Use a number of when you mean several people or things. Use the number of when you mean one total figure. That small word change, a or the, changes the verb.
The Main Difference Between A Number Of And The Number Of
A number of points to the people or things themselves. Because those people or things are plural, the verb is usually plural too.
✅ A number of employees are working from home today.
✅ A number of changes have been made to the report.
The number of points to one number, one total, or one amount. Since number is singular here, the verb is singular.
✅ The number of employees is higher this year.
✅ The number of changes has surprised the team.
Think of it this way: a number of means many individual items. the number of means one total count.
How To Use A Number Of Correctly
Use a number of before a plural countable noun. The phrase means several, some, or quite a few. The verb after it should normally be plural.
✅ Correct Pattern
A number of + plural noun + plural verb
A number of visitors are waiting outside.
❌ Common Mistake
Do not use a singular verb after this phrase in normal writing.
A number of visitors is waiting outside.
Here, the sentence is really talking about visitors, not one single number. That is why are, were, have, or another plural verb form fits naturally.
More Examples With A Number Of
- ✅ A number of students have asked the same question.
- ✅ A number of books were missing from the shelf.
- ✅ A number of people are interested in the course.
- ✅ A number of problems need attention.
How To Use The Number Of Correctly
Use the number of when you are talking about a specific total, even if you do not give the exact figure. The noun after of is usually plural, but the main idea is still one number.
✅ Correct Pattern
The number of + plural noun + singular verb
The number of visitors is rising.
❌ Common Mistake
Do not let the plural noun before the verb trick you.
The number of visitors are rising.
In this sentence, visitors is plural, but the real subject is the number. One number is rising. One total has changed. One figure was recorded.
More Examples With The Number Of
- ✅ The number of students has increased this semester.
- ✅ The number of errors was lower than expected.
- ✅ The number of available seats is limited.
- ✅ The number of applications has doubled.
A Number Of Vs The Number Of In A Table
| Phrase | Meaning | Noun After Of | Verb Form | Example |
|---|---|---|---|---|
| A number of | Several, some, quite a few | Plural countable noun | Plural | A number of guests are here. |
| The number of | The total figure or amount | Plural countable noun | Singular | The number of guests is higher today. |
Why A Number Of Takes A Plural Verb
A number of acts like a plural quantity expression. It does not focus on the word number in a mathematical way. It focuses on the plural noun that follows.
A number of customers have complained.
Meaning: Several customers have complained.
You would not say several customers has complained. The same logic applies here. Since customers is plural, the verb should be plural: have.
Why The Number Of Takes A Singular Verb
The number of is different because it points to one measurable total. The sentence is not mainly about the people or things. It is about the count.
The number of customers has increased.
Meaning: The total count has increased.
The plural word customers sits close to the verb, so it can feel tempting to write have increased. But the subject is the number, and number is singular.
Common Mistakes And Easy Fixes
| Incorrect Sentence | Correct Sentence | Why It Changes |
|---|---|---|
| ❌ A number of users is online. | ✅ A number of users are online. | A number of means several, so use a plural verb. |
| ❌ The number of users are online. | ✅ The number of users is online. | The number is one total, so use a singular verb. |
| ❌ A number of reports has arrived. | ✅ A number of reports have arrived. | The sentence means several reports. |
| ❌ The number of reports have changed. | ✅ The number of reports has changed. | The sentence means the total count. |
Use A Number Of When You Mean Several
Choose a number of when the exact count is not important. You simply mean that more than one person or thing is involved.
Use It For People
✅ A number of teachers are attending the workshop.
Use It For Things
✅ A number of files were updated last night.
This phrase is useful when you want to sound clear but not too exact. It is more formal than some, but still easy to understand.
Use The Number Of When You Mean The Total
Choose the number of when the sentence is about a count, a rate, a change, or a measurable total.
Use It For A Total
✅ The number of tickets sold is 500.
Use It For A Trend
✅ The number of online orders has increased.
Ask yourself one simple question: Am I talking about several things, or one total? If you mean several things, use a number of. If you mean one total, use the number of.
What Comes After A Number Of And The Number Of?
Both phrases are normally followed by a plural countable noun. That means words like students, questions, books, errors, visitors, and ideas.
✅ A number of questions were answered.
✅ The number of questions was high.
❌ A number of information was shared.
✅ A lot of information was shared.
Information is usually uncountable, so a number of information sounds wrong. Use a lot of information, some information, or several pieces of information instead.
Large Number Of, Small Number Of, And Growing Number Of
Adding an adjective before number does not remove the main rule. If the phrase starts with a, it usually works like a number of and takes a plural verb.
- ✅ A large number of people are expected to attend.
- ✅ A small number of rooms are still available.
- ✅ A growing number of users are choosing mobile apps.
When the phrase starts with the, it usually points to one specific total and takes a singular verb.
- ✅ The total number of people is unknown.
- ✅ The exact number of rooms has not been confirmed.
- ✅ The growing number of users is a clear trend.
In everyday writing, a growing number of people are is much more common and natural when you mean more and more people.
Simple Memory Trick
A = Several. The = Total.
A number of people are. The number of people is.
That short rule catches most mistakes. A number of answers are correct. The number of correct answers is ten. Same noun. Different meaning. Different verb.
Practice Examples
Choose the correct verb in each sentence. The answer is shown right after each one, so you can check the pattern as you read.
- A number of emails has / have arrived. ✅ have
- The number of emails has / have increased. ✅ has
- A number of parents was / were at the meeting. ✅ were
- The number of parents was / were higher than expected. ✅ was
- A number of pages needs / need editing. ✅ need
- The number of pages needs / need to be checked. ✅ needs
Frequently Asked Questions
Is A Number Of Grammatically Correct?
Yes. A number of is grammatically correct when it means several or some. It should be followed by a plural countable noun and a plural verb: A number of students are absent.
Is The Number Of Grammatically Correct?
Yes. The number of is grammatically correct when it means the total amount or the total count. It usually takes a singular verb: The number of students is small.
Do I Say A Number Of People Is Or Are?
Say a number of people are. The phrase means several people, so the verb should be plural.
Do I Say The Number Of People Is Or Are?
Say the number of people is. The sentence is about one number, not the people themselves.
Can I Use A Number Of With Uncountable Nouns?
Usually, no. Use a number of with plural countable nouns, such as questions, students, or problems. For uncountable nouns, use a different phrase: some information, a lot of advice, or several pieces of evidence.
Which Is More Formal, A Number Of Or Several?
A number of is slightly more formal than several. Both are correct. In very simple writing, several is often clearer. In more polished writing, a number of can sound natural when used carefully.
