If you learn only one verb in English properly, make it this one.
Be is the most frequent verb in the language by a wide margin, and it does three separate jobs at once. It appears as a main verb, as the engine of every continuous tense, and as the backbone of the passive voice. Get it right and a large portion of English suddenly works.
Get it wrong — or leave it out, as speakers of many languages naturally do — and every sentence sounds broken.
This guide covers is, are, am, was, were completely: the forms, the three jobs, the errors, and the shortcuts that make it automatic.
The Forms: Only Six to Learn
Present:
I am
you are
he / she / it is
we are
they are
Past:
I was
you were
he / she / it was
we were
they were
The shortcut that covers almost everything:
Present: I takes am. He, she, it and singular nouns take is. Everything else takes are. Past: I, he, she, it and singular nouns take was. Everything else takes were.
That is the entire system. Six forms, two simple patterns.
Rule One: English Requires This Verb
This is the most important thing in the article, and the source of the most common error made by Arabic, Russian, Turkish, and Chinese speakers.
In those languages, you can say the equivalent of "He tired" or "I student" and it is perfectly correct. English does not allow this.
Every English clause needs a verb. When there is no action, that verb is be.
❌ He tired. → ✅ He is tired.
❌ I student. → ✅ I am a student.
❌ They in the office. → ✅ They are in the office.
❌ She happy. → ✅ She is happy.
❌ The weather nice today. → ✅ The weather is nice today.
Why English insists: because it has almost no case endings, English relies on structure to carry grammar. The verb marks the tense, and without it the sentence has no time reference at all.
Job One: Describing and Identifying
This is the use you meet first — connecting a subject to a description or an identity.
With adjectives:
I am tired. She is clever. They are busy. The soup is cold.
With nouns:
He is a doctor. We are students. That was a mistake.
With locations:
The keys are on the table. I am at home. She was in London.
With age, time, and weather:
I am 25. It is three o'clock. It was cold yesterday.
Two errors this covers:
❌ I have 25 years → ✅ I am 25. (Arabic, French, and Spanish all use have here. English uses be.)
❌ I have hungry → ✅ I am hungry.
The same family: I'm cold, I'm hot, I'm right, I'm wrong, I'm afraid, I'm thirsty, I'm sleepy. All use be.
Job Two: Building Continuous Tenses
BE + verb-ing creates every continuous tense in English.
Present continuous — happening now, or temporary:
I am working. She is studying. They are waiting.
Past continuous — in progress at a past moment:
I was working when she called. They were sleeping.
The pattern never changes. Only the form of be moves the sentence through time.
The rule that prevents many errors: some verbs describe states, not actions, and are almost never used in continuous form — know, want, like, need, believe, understand, own, seem, love, hate.
❌ I am knowing the answer → ✅ I know the answer.
❌ I am wanting water → ✅ I want water.
❌ She is having a car → ✅ She has a car.
But note: have can be continuous when it means an activity rather than possession. I'm having lunch and I'm having a shower are both correct.
Job Three: The Passive Voice
BE + past participle creates the passive, used when the action matters more than who did it.
The house was built in 1990. English is spoken here. The report was written by Sara.
Compare active and passive:
Active: Someone stole my bag.
Passive: My bag was stolen.
The passive is common in news, instructions, academic writing, and any situation where the doer is unknown or unimportant.
Questions: Just Swap the Order
This is where be is easier than every other English verb.
With be, you simply invert subject and verb. No helper needed.
You are ready. → Are you ready?
She is a doctor. → Is she a doctor?
They were late. → Were they late?
Compare with other verbs, which need do/does/did:
You like coffee. → Do you like coffee?
With question words, they go first:
Where are you? Who is that? Why was he late? How are you?
Negatives: Just Add "Not"
Again, no helper verb required.
I am not → I'm not
you are not → you aren't / you're not
he is not → he isn't / he's not
they were not → they weren't
I was not → I wasn't
Note: there is no contraction for am not in standard English. "I amn't" does not exist. Use I'm not.
Contractions: What Natural Speech Sounds Like
Native speakers contract almost always in speech. Not using contractions sounds stiff and textbook.
I am → I'm
you are → you're
he is → he's
she is → she's
it is → it's
we are → we're
they are → they're
Note: was and were have no positive contractions. You cannot say I'se. Only the negatives contract: wasn't, weren't.
The spelling trap that catches everyone, including native speakers:
it's = it is or it has
its = belonging to it
It's cold. The dog wagged its tail.
Same for you're (you are) versus your (belonging to you), and they're / their / there.
There Is and There Are
This is a separate structure worth learning as a unit, and it confuses many learners.
There is + singular: There is a problem.
There are + plural: There are two options.
There was + singular: There was a delay.
There were + plural: There were many people.
The verb agrees with what comes after, not with "there".
✅ There are three books on the table.
❌ There is three books on the table.
And in casual speech, you will hear "There's two people outside", which is technically incorrect but extremely common. Recognise it; write it correctly.
The Errors That Repeat Most
Missing the verb entirely — ❌ He tired → ✅ He is tired. The single most common error for speakers of article-free and copula-free languages.
Using "have" for age and states — ❌ I have 25 years → ✅ I am 25.
Was and were mixed up — ❌ They was here → ✅ They were here. (Common in some native dialects too, but not standard.)
"Be" with a main verb in the present simple — ❌ I am work here → ✅ I work here. Am only goes with -ing forms.
Missing the subject with "it" — ❌ Is raining → ✅ It is raining.
"Is" with a plural subject — ❌ The books is on the table → ✅ The books are on the table.
"I am agree" — ❌ → ✅ I agree. Agree is a verb, not an adjective.
There is / there are mismatch — covered above.
The Trickiest Agreement Cases
These catch even advanced learners.
"Everyone" and "everybody" take a singular verb, despite meaning many people:
Everyone is here. (not are)
"The news" is singular:
The news is bad.
"Police" is plural:
The police are investigating.
Collective nouns vary by region: British English often uses a plural verb for a group acting as individuals (The team are arguing), while American English prefers singular (The team is winning). Both are acceptable in their own varieties.
Distance, money, and time as a single amount take singular:
Five miles is a long way. Twenty dollars is too much.
How to Make This Automatic
Understanding be takes five minutes. Producing it correctly under pressure takes practice.
Chant the forms out loud — present and past, ten times each, until they arrive without thought.
Write twenty sentences daily about yourself using be: how you feel, where you are, what you were doing.
Practise questions and negatives for every sentence you build. I am tired → Am I tired? → I'm not tired.
Hunt for missing verbs. Read your own writing specifically looking for sentences with no verb. This is the error you will find most.
Drill was and were with a rapid-fire partner. These arrive too fast in speech to calculate.
Use contractions when speaking. I'm, you're, he's — the full forms sound unnatural in conversation.
Record yourself describing your day in past tense and count the was/were errors.
The Honest Summary
Be is irregular, unavoidable, and worth every minute you spend on it.
It has only six forms. It does three jobs. And it forms questions and negatives more simply than any other verb in the language.
Master it completely — including the habit of never leaving it out — and you have fixed the single most audible error in beginner English. Most of the sentences that sound "broken" to a native ear are broken in exactly this one place.
Fix it first, and everything after gets easier.
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