Assumptions with modal verbs

In this lesson, we will explore how to express conjectures or assumptions in German using modal verbs in the Konjunktiv II form. Modal verbs convey varying degrees of likelihood in assumptions.

1. Können

The verb "können" typically expresses ability or possibility. For weak assumptions, we use the Konjunktiv II form "könnte".
Example:
Es könnte heute regnen.
(It might rain today.)
For stronger predictions, we use "kann".
Example:
Es kann sein, dass es heute regnet.
(It is possible that it will rain today.)
! Note: If we add "kein" or "nicht", an assumption with "können" becomes impossible.
Example:
Es kann heute nicht regnen.
(It cannot rain today.)

2. Dürfen

The verb "dürfen" signifies a stronger assumption than "kann" or "könnte". In the Konjunktiv II, we use "dürfte".
Example:
Es dürfte heute regnen.
(It is likely to rain today.)

3. Müssen

"Müssen" represents a very strong assumption, indicating a high probability. The Konjunktiv II form is "müsste".
Example:
Es müsste heute regnen.
(It must rain today.)
This indicates a certainty that the action or event will occur.
Example:
Er muss heute zum Arzt.
(He must go to the doctor today.)

4. Sollen

The verb "sollen" expresses the expectation that something will happen.
Example:
Laut Wettervorhersage soll es heute regnen.
(According to the weather forecast, it is supposed to rain today.)
In this case, the speaker predicts rain based on some information.
You can also use "sollten" to emphasize expectations.
Example:
Es sollte (eigentlich) heute noch regnen.
(It should rain today (actually).)

5. Mögen

The verb "mögen" indicates that an action or event is likely occurring.
Example:
Es mag sein, dass es heute noch regnet, aber ich brauche keinen Regen.
(It may be that it rains today, but I don't need rain.)
This suggests that it is already raining.
Example:
Es mag (schon) sein, dass du recht hast, aber ich habe trotzdem Zweifel.
(You may be right, but I still have doubts.)

Summary:

Modal verbs allow us to express assumptions and probabilities in different ways.

After this lesson, learners will be able to express assumptions in German accurately and with nuance.