Will and Might for Predictions: Expressing Future Certainty (B1 Grammar) — B1 English grammar lesson by Langcom

Will and Might for Predictions: Expressing Future Certainty (B1 Grammar)

Raúl Maguiña

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

September 6, 2026

B1✏️ Grammatik⏱️ 5 Minuten Lesezeit
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Will und might are modal verbs we use to talk about the future, specifically to make predictions. They both help us guess what will happen, but they show different levels of certainty. Use will when you are very sure or confident about a future event. For example, I think it will rain tomorrow means you believe it strongly. On the other hand, use might when you are less certain, indicating a possibility. For instance, It might rain tomorrow suggests it’s possible, but you’re not confident. Understanding this difference is key for clear communication about future events in English.

What are ‘will’ and ‘might’ for predictions?

Will und might are special verbs called modal verbs. We use them to talk about what we expect to happen in the future.

They help us express how sure or unsure we are about a prediction.

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When to use will for predictions?

Verwendung will when you are very sure or confident about a prediction. You believe something is very likely to happen.

  • It shows a strong belief or expectation.
  • We often use phrases like I think, I'm sure, oder I believe mit will.

When to use might for predictions?

Verwendung might when you are less sure. It means something is possible, but not certain.

  • It shows a possibility, not a strong expectation.
  • The chance of it happening is lower than with will.
  • Might is similar to may for expressing possibility.

How to form sentences with will und might?

Beides will und might are modal verbs, so their structure is simple. They are the same for all persons (I, you, he, she, it, we, they).

  • Positive: Subject + will/might + base form of the verb
  • Negative: Subject + will not (won't) / might not + base form of the verb
  • Questions (with will): Will + subject + base form of the verb? (We usually don't make direct questions with might for predictions, but use phrases like Do you think...?)

Remember the short forms:

  • will = 'll (z. B., I'll go)
  • will not = won't (z. B., She won't come)

Common phrases with will und might

We often use introductory phrases to make our predictions sound more natural.

  • Für will:
    I think... I don't think... I'm sure... I believe...
    Beispiel: I think she'll pass the exam.
  • Für might:
    I think... (but with less certainty)
    Beispiel: I think it might rain later.
  • For questions:
    Do you think...?
    Beispiel: Do you think they'll win the game?
  • Short answers:
    I think so. / I don't think so.
    We might. / We might not.
Forms of <span data-no-translation>Will</span> und <span data-no-translation>Might</span> for Predictions
<span data-no-translation>Will</span> (Sure Prediction) <span data-no-translation>Might</span> (Possible Prediction)
Positive I will go. / I'll go. I might go.
Negative I will not go. / I won't go. I might not go.
Question Will you go? Do you think you might go?

Beispiele

  • I think the new movie will be very popular.
  • She won't be late for the meeting, I'm sure.
  • Do you think he'll accept the job offer?
  • They might visit us next weekend, but they haven't decided yet.
  • It might not be warm enough to swim today.
  • I don't think I'll finish this project by Friday.
  • He might get a promotion next year.
  • I'm sure you'll do great on your presentation!

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Häufige Fehler bei Spanischsprechern

Spanish speakers sometimes confuse the level of certainty between will und might.

  • Mistake 1: Using will for low certainty.
    Falsch: I will go to the party, but I'm not sure.
    Richtig: I might go to the party, but I'm not sure.
    (Use might when you are not sure.)
  • Mistake 2: Forgetting the base form of the verb.
    Falsch: He will goes to the gym tomorrow.
    Richtig: He will go to the gym tomorrow.
    (After will oder might, always use the base form of the verb, without -s, -ed, oder -ing.)
  • Mistake 3: Using might not incorrectly.
    Falsch: It might not to rain.
    Richtig: It might not rain.
    (Do not add to danach might not.)

Häufig gestellte Fragen

What is the main difference between 'will' and 'might' for predictions?

The main difference is certainty. Use will when you are very sure about a prediction, and might when you are less sure, indicating a possibility.

Can I use 'may' instead of 'might' for predictions?

Ja, may can also be used to express possibility, similar to might. Zum Beispiel:, It may rain means the same as It might rain.

Do 'will' and 'might' change for different subjects (I, he, they)?

Nein, will und might are modal verbs, so they do not change form for different subjects. You always use will oder might followed by the base form of the main verb.

How do I make a negative prediction with 'will'?

To make a negative prediction with will, you use will not or its contraction won't. Zum Beispiel:, I won't be able to come.

Verwandte Lektionen

Über den Autor: Raúl Maguiña

Raúl Maguiña ist Leiter der Asociación Educativa Langcom, einem autorisierten Cambridge English-Vorbereitungszentrum in Ihr Land. 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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