Modal Verbs (Subjective Use) in German

Overview

You already know German modal verbs in their objective use — expressing ability (können), obligation (müssen), permission (dürfen), and so on. At the C1 level, you need to master their subjective use, where modal verbs express the speaker's degree of certainty or probability about a statement rather than an obligation or ability. This is one of the subtler and more advanced areas of German grammar.

When someone says Er muss krank sein (He must be sick), they are not saying he is obligated to be sick — they are expressing a strong inference. Similarly, Sie dürfte etwa 40 sein (She is probably around 40) uses dürfte not for permission but for a cautious estimate. The same modal verbs you learned at A2 take on entirely new meanings at this level.

This subjective use of modals is essential for understanding nuance in German. It appears constantly in news commentary, academic discussion, and everyday speculation. Recognizing whether a modal verb is being used objectively or subjectively can change the meaning of a sentence completely.

How It Works

Subjective modal meanings

Modal	Objective meaning	Subjective meaning	Degree of certainty
müssen	must (obligation)	must (strong inference)	~95% certain
dürfte	may (permission, Konj. II)	probably, likely	~75% certain
können	can (ability)	could possibly	~50% certain
mögen	to like	may (concession)	~50% certain
sollen	should (obligation)	is said to, reportedly	hearsay
wollen	to want	claims to	claimed by subject

Present time reference

Structure: modal verb (present) + infinitive

German	English	Modal meaning
Er muss krank sein.	He must be sick.	Strong inference
Sie dürfte etwa 40 sein.	She's probably around 40.	Probable guess
Das kann nicht stimmen.	That can't be right.	Impossibility
Er soll sehr reich sein.	He is said to be very rich.	Hearsay
Sie will alles gesehen haben.	She claims to have seen everything.	Subject's own claim

Past time reference

Structure: modal verb (present) + past participle + haben/sein

German	English	Modal meaning
Er muss das gewusst haben.	He must have known that.	Strong past inference
Sie dürfte schon gegangen sein.	She has probably already left.	Probable past guess
Das kann nicht passiert sein.	That can't have happened.	Past impossibility
Er soll dort gewesen sein.	He is said to have been there.	Past hearsay

Key distinction: objective vs. subjective

Sentence	Objective reading	Subjective reading
Er muss arbeiten.	He must work. (obligation)	— (no infinitive complement suggesting inference)
Er muss krank sein.	—	He must be sick. (inference)
Sie kann schwimmen.	She can swim. (ability)	—
Sie kann krank sein.	—	She could be sick. (possibility)

Tip: Subjective modals typically appear with sein, haben, or stative verbs. The presence of sein or haben as the infinitive often signals subjective use.

Examples in Context

German	English	Note
Er muss das gewusst haben.	He must have known that.	Strong inference about the past
Sie dürfte etwa 40 sein.	She's probably around 40.	Cautious estimate
Das kann nicht stimmen.	That can't be right.	Rejecting a claim
Er soll sehr erfolgreich sein.	He is said to be very successful.	Hearsay/reputation
Sie will die Wahrheit kennen.	She claims to know the truth.	Subject's own claim (unverified)
Das mag sein.	That may be (so).	Concession
Er muss sehr müde gewesen sein.	He must have been very tired.	Past inference
Das dürfte kein Problem sein.	That probably won't be a problem.	Reassuring estimate
Sie kann das nicht gemacht haben.	She can't have done that.	Denying past possibility
Er soll gestern angekommen sein.	He reportedly arrived yesterday.	Reported information
Das müsste eigentlich funktionieren.	That really ought to work.	Expectation (Konj. II of müssen)
Sie will nichts davon gewusst haben.	She claims to have known nothing about it.	Subject denies knowledge

Common Mistakes

Interpreting subjective modals as objective

• Wrong reading: Er muss krank sein. = He is obligated to be sick.
• Right reading: He must be sick. (= I infer he is sick.)
• Why: Context determines whether a modal is objective or subjective. With sein or haben as the main verb, the subjective reading is almost always intended.

Confusing sollen and wollen in subjective use

• Wrong: Er will reich sein. (meaning "he is said to be rich")
• Right: Er soll reich sein. (He is said to be rich.) / Er will reich sein. (He claims to be rich.)
• Why: Sollen = reported by others (hearsay). Wollen = claimed by the subject themselves. The source of the information is different.

Using dürfen instead of dürfte for probability

• Wrong: Sie darf 40 sein. (= She is allowed to be 40.)
• Right: Sie dürfte 40 sein. (She is probably 40.)
• Why: The subjective probability meaning requires the Konjunktiv II form dürfte, not the indicative darf.

Forming the past reference incorrectly

• Wrong: Er musste das gewusst haben. (past tense of modal)
• Right: Er muss das gewusst haben. (present tense modal + past infinitive)
• Why: For subjective past inferences, keep the modal in the present tense and shift the infinitive to the past (past participle + haben/sein). Using musste changes the meaning to objective past obligation.

Usage Notes

Subjective modal use is pervasive in spoken and written German at all levels of formality. In casual conversation, Das muss...sein and Das kann nicht...sein are everyday expressions. In journalism, sollen is the standard way to attribute information to sources: Der Verdächtige soll in der Nacht geflohen sein (The suspect reportedly fled during the night).

The distinction between sollen (others say) and wollen (the person themselves claims) is crucial in legal and journalistic German. A court report might say Der Angeklagte will zur Tatzeit zu Hause gewesen sein (The defendant claims to have been at home at the time of the crime) — using will signals that this is the defendant's own unverified claim.

Dürfte is the most nuanced of the subjective modals. It expresses careful probability and is favored in academic and scientific writing when making cautious claims: Dieser Ansatz dürfte vielversprechend sein (This approach is likely to be promising). It conveys confidence tempered with appropriate academic hedging.

Mögen in subjective use is relatively rare in modern German and sounds somewhat formal or literary: Das mag stimmen (That may be true). In everyday speech, kann sein or vielleicht are more common alternatives.

Practice Tips

1. Take a news article and identify all modal verbs. For each one, determine whether it is being used objectively or subjectively. This analytical practice sharpens your ability to distinguish the two uses in real texts.
2. Practice creating inference chains: Er kommt nicht zur Arbeit. Er muss krank sein. Er dürfte gestern schon Symptome gehabt haben. Er soll letzte Woche auf einer Party gewesen sein. This builds fluency with different subjective modals.
3. Pair sollen and wollen in practice sentences about the same event to internalize the source distinction: Er soll reich sein (others say) vs. Er will reich sein (he says so himself).

Related Concepts

• Modal Verbs: können, müssen — the foundational objective use of modal verbs