Mastering Can and Can’t: Expressing Ability in English (A2)

Raúl Maguiña

Gründer von Langcom | Prüfer für Cambridge- und SIELE-Prüfungen

August 2, 2026

A2✏️ Grammatik⏱️ 5 Minuten Lesezeit
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To talk about what you are able to do now, use can. To talk about what you are not able to do now, use can’t. These words are modal verbs. They help us express present ability. For example, if you say I can speak English, it means you have the skill or knowledge to speak English. If you say I can’t swim, it means you do not have the ability to swim. The structure is simple: Subject + can/can’t + the base form of the verb. This means the verb after can oder can’t never changes its form, even for ‘he’ or ‘she’. This makes it very easy to use for all subjects (I, you, he, she, it, we, they). You will use can und can’t often in daily conversations to describe your skills and capabilities.

What is ‘Can’ for Present Ability?

Can is a modal verb. We use it to show that someone has the skill, knowledge, or possibility to do something in the present.

  • It tells us what is possible or what someone is capable of doing right now.
  • The structure is always Subject + can + the base form of the verb.

Zum Beispiel:

  • I can play the guitar. (This means I have the skill to play it.)
  • She can run very fast. (This means she has the physical ability.)

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How Do We Use 'Can't' for Inability?

Can't ist die Verneinungsform von can. It is short for cannot.

  • Wir verwenden can't to show that someone does nicht have the skill, knowledge, or possibility to do something in the present.
  • The structure is Subject + can't + the base form of the verb.

Zum Beispiel:

  • He can't cook well. (He does not have the skill to cook well.)
  • We can't meet tomorrow. (It is not possible for us to meet.)

Asking Questions with 'Can'

To ask about someone's ability or if something is possible, we put Can am Anfang der Frage.

  • The structure is Can + Subject + the base form of the verb?
  • Für kurze Antworten verwenden wir Yes, + Subject + can. oder No, + Subject + can't.

Zum Beispiel:

  • Can you swim? Yes, I can. (I have the ability.)
  • Can she speak French? No, she can't. (She does not have the skill.)

What About Past Ability? ('Could' and 'Couldn't')

While can und can't are for present ability, we use could und couldn't für past ability.

  • Could means 'was able to' or 'had the ability to' in the past.
  • Couldn't means 'was not able to' or 'did not have the ability to' in the past.

Zum Beispiel:

  • When I was young, I could climb trees. (I had the ability in the past.)
  • My grandfather couldn't use a computer. (He did not have the ability in the past.)

Key Rules for Using 'Can' and 'Can't'

Can und can't are special verbs called modal verbs. They follow simple rules:

  • No 'to' after can/can't: Always use the base form of the verb without to.
    Richtig: I can play.
    Falsch: I can to play.
  • No '-s' for 'he/she/it': Can does not change its form for any subject.
    Richtig: He can sing.
    Falsch: He cans sing.
  • No 'do/does' in questions or negatives: Do not use auxiliary verbs do oder does mit can.
    Richtig: Can you help?
    Falsch: Do you can help?
Structure of 'Can' and 'Can't' for Present Ability
Form Aufbau Beispiel
Positive Subject + can + Base Verb I can sing.
Negative Subject + can't + Base Verb She can't dance.
Question Can + Subject + Base Verb? Can you swim?

Beispiele

  • My brother can speak three languages fluently.
  • I can't drive a car yet, but I'm learning.
  • Can you help me with this heavy box?
  • She can play the piano beautifully.
  • We can't come to the party tonight.
  • The baby can walk now!
  • They can't hear you from here.
  • Can I borrow your pen for a moment?

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Häufige Fehler bei Spanischsprechern

Spanish speakers sometimes make specific mistakes with can und can't:

  • Adding 'to' after can: In Spanish, you might use 'poder + infinitive', but in English, can is directly followed by the base verb.
    Falsch: I can to swim.
    Richtig: I can swim.
  • Using 'do/does' in questions: Can is a modal verb, so it forms questions by itself.
    Falsch: Do you can speak English?
    Richtig: Can you speak English?
  • Changing 'can' for 'he/she/it': Remember, can never changes its form.
    Falsch: She cans play tennis.
    Richtig: She can play tennis.

Häufig gestellte Fragen

What is 'can' used for in English?

Can is used to express present ability, possibility, or permission. For example, I can sing means you have the skill to sing.

How do I make 'can' negative?

To make can negative, you use can't (short for cannot). For example, I can't swim means you are not able to swim.

Is 'can' a regular verb?

Nein, can is a modal verb. This means it has special rules: it doesn't change form for different subjects (like he cans), and it's always followed by the base form of another verb without to.

How is 'can' used in the A2 Key (KET) exam?

In the A2 Key exam, you might see can und can't in reading tasks (e.g., understanding descriptions of abilities) or listening tasks (e.g., identifying what someone can or can't do). You may also need to use it correctly in writing tasks, such as describing yourself or others.

What is the difference between 'can' and 'could'?

Can is used for present ability (what you are able to do now), while could is used for past ability (what you were able to do in the past). For example, I can speak English (now) vs. When I was five, I could ride a bike (in the past).

Verwandte Lektionen

Über den Autor: Raúl Maguiña

Raúl Maguiña ist Leiter der Asociación Educativa Langcom, einem autorisierten Cambridge English-Vorbereitungszentrum in the UK. Mit mehr als einem Jahrzehnt Erfahrung in der Sprachausbildung und der internationalen Zertifizierung hat er Tausenden von Schülern, Lehrern und Bildungseinrichtungen in 25 Ländern zu Cambridge-, IELTS-, TOEFL- und Michigan-Englischzertifikaten verholfen.

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