Master Verb Be: Positive and Negative (Pre-A1 English Grammar)

Raúl Maguiña

Fondateur de Langcom | Examinateur pour les examens de Cambridge et du SIELE

juillet 20, 2026

PRÉ-A1✏️ Grammaire⏱️ 4 min read
The verb be is one of the most important verbs in English. It helps us talk about who someone is, what something is, where people or things are, and how they feel or look. In English, be has three main forms in the present simple: am, is, et are. We use am with I, is with he, she, it (singular subjects), and are with you, we, they (plural subjects). To make these negative, we simply add not after the verb: am not, is not, are not. Learning these forms is a key first step to speaking English.

What is the Verb Be?

The verb be is very common in English. It helps you describe things and people. It also tells you where things are.

Think of be like “ser” and “estar” in Spanish. English uses only one verb for both ideas.

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How Do We Use Be in Positive Sentences?

The verb be changes its form depending on the subject. There are three forms for the present simple:

  • We use am with I.
    • Exemple : I am happy.
  • We use is with he, she, it, and singular nouns (one person, one thing).
    • Exemple : He is a student.
    • Exemple : It is cold.
  • We use are with you, we, they, and plural nouns (more than one person, more than one thing).
    • Exemple : You are kind.
    • Exemple : They are friends.

How Do We Use Be in Negative Sentences?

To make a sentence negative, we add not after the verb be.

  • With I: am not
    • Exemple : I am not sad.
  • With he, she, it: is not
    • Exemple : She is not from Spain.
  • With you, we, they: are not
    • Exemple : We are not tired.

What Are Contractions with Be?

In spoken English and informal writing, we often use contractions. Contractions are shorter forms of words.

  • For positive sentences:
    • I am becomes I’m (e.g., I’m a student.)
    • He is becomes He’s (e.g., He’s tall.)
    • She is becomes She’s (e.g., She’s my sister.)
    • It is becomes It’s (e.g., It’s sunny.)
    • You are becomes You’re (e.g., You’re welcome.)
    • We are becomes We’re (e.g., We’re friends.)
    • They are becomes They’re (e.g., They’re at home.)
  • For negative sentences:
    • I am not becomes I’m not (e.g., I’m not hungry.)
    • He is not becomes He isn’t ou He’s not (e.g., He isn’t here. ou He’s not here.)
    • She is not becomes She isn’t ou She’s not
    • It is not becomes It isn’t ou It’s not
    • You are not becomes You aren’t ou You’re not (e.g., You aren’t right. ou You’re not right.)
    • We are not becomes We aren’t ou We’re not
    • They are not becomes They aren’t ou They’re not

When Do We Use the Verb Be?

We use be for many things. Here are some common uses:

  • To talk about identity or names:
    • I am Maria.
    • He is a doctor.
  • To talk about age:
    • She is ten years old.
    • They are 25.
  • To talk about feelings or descriptions:
    • We are happy.
    • It is a big house.
  • To talk about location:
    • You are at home.
    • The book is on the table.
Present Simple Forms of Verb <span data-no-translation>Be</span>
Subject Positive Form Negative Form Positive Contraction Negative Contraction
I am am not I’m I’m not
He / She / It is is not He’s / She’s / It’s isn’t / He’s not / She’s not / It’s not
You / We / They are are not You’re / We’re / They’re aren’t / You’re not / We’re not / They’re not

Exemples

  • I am a student.
  • He is my brother.
  • She is happy.
  • It is a cat.
  • You are tall.
  • We are friends.
  • They are in the park.
  • I am not tired.
  • He isn’t here.
  • They aren’t sad.

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Erreurs courantes chez les hispanophones

Spanish speakers sometimes make these mistakes with be:

  • Using have for age: In Spanish, you say “Tengo X años”. In English, we use be.
    • Wrong: I have 10 years.
    • Right: I am 10 years old.
  • Forgetting the subject pronoun: In Spanish, you can often omit the subject (e.g., “Es feliz”). In English, you always need a subject.
    • Wrong: Is happy.
    • Right: He is happy. ou She is happy.
  • Confusing ser et estar: Remember, English uses only be for both.
    • Spanish: “Soy alto” (ser) and “Estoy cansado” (estar).
    • English: I am tall. et I am tired.

Questions fréquemment posées

What are the three present forms of be?

The three present forms are am, is, et are.

How do I make I am negative?

You add not: I am not ou I’m not.

Can I use isn’t and is not?

Yes, isn’t is a contraction for is not. Both are correct, but isn’t is more common in speaking.

When do I use is?

You use is with singular subjects like he, she, it, or one person/thing (e.g., The dog is big.).

Leçons associées

À propos de l'auteur : Raúl Maguiña

Raúl Maguiña est le directeur de l'Asociación Educativa Langcom, un centre agréé de préparation à l'examen Cambridge English situé à ÉTATS-UNIS. Fort de plus d'une décennie d'expérience dans l'enseignement des langues et les certifications internationales, il a aidé des milliers d'étudiants, d'enseignants et d'établissements d'enseignement dans 25 pays à obtenir les certifications d'anglais Cambridge, IELTS, TOEFL et Michigan.

En savoir plus sur le Langcom →

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