German Purpose Clauses with *um...zu* and *damit*

In Brief

Use um ... zu + infinitive when the person or thing carrying out both actions is the same: Ich spare, um zu reisen (“I am saving in order to travel”). Use damit + finite clause when the purpose has its own stated subject: Ich spare, damit meine Tochter reisen kann (“I am saving so that my daughter can travel”). Put a comma before either construction.

Overview

A purpose clause answers wozu? or zu welchem Zweck?—“what for?” or “for what purpose?” It explains the intended goal behind an action. In Ich lerne Deutsch, um in Berlin zu arbeiten, learning German is the action and working in Berlin is its purpose.

German has two main ways to express this relationship. An infinitive is the basic, unconjugated form of a verb, such as arbeiten. The compact construction um ... zu + infinitive does not state a new subject; its understood subject comes from the main clause. By contrast, damit introduces a subordinate clause (a clause that depends on another clause), with an explicit subject and a conjugated verb at the end.

This distinction is normally introduced at B1. It matters because English often uses “to,” “in order to,” or “so that” more freely. A natural English infinitive may need either German construction depending on who is expected to perform the action.

How It Works

The central choice: who carries out the purpose?

Situation	German construction	Pattern
The same subject carries out both actions	um ... zu	main clause, um + other elements + zu + infinitive
The purpose has a different subject	damit	main clause, damit + subject + other elements + finite verb

Compare these two sentences:

• Mara fährt früh los, um den Zug zu erreichen. Mara leaves early, and Mara intends to catch the train. Because the subject is the same, um ... zu is the concise choice.
• Mara fährt früh los, damit ihr Sohn den Zug erreicht. Mara leaves early, but her son is the person who needs to catch the train. The purpose therefore needs its own clause and subject: ihr Sohn.

The “same subject” rule is more precisely a rule about who controls the unstated subject of the infinitive. In an ordinary active sentence, that is usually the grammatical subject (the person or thing the sentence is about) of the main clause:

• Wir öffnen das Fenster, um das Zimmer zu lüften. We open it; we air the room.
• Lea ruft Paul an, damit er die Adresse bestätigt. Lea calls; Paul confirms.

Forming um ... zu

Put um at the beginning of the purpose phrase and zu + infinitive at its end. Anything belonging to the infinitive—objects, adverbs, prepositional phrases, or negation—usually comes between them.

Element	Example
Main clause	Ich gehe heute früher ins Bett
Comma + um	, um
Middle of the phrase	morgen fit
zu + infinitive	zu sein.

The complete sentence is Ich gehe heute früher ins Bett, um morgen fit zu sein. (“I am going to bed earlier today so that I will be fit tomorrow.”)

The infinitive does not change for person or number:

• Ich trainiere, um fit zu bleiben.
• Wir trainieren, um fit zu bleiben.

There is no subject pronoun after um. German does not say um ich ... or um wir .... If you need to state a subject, use damit.

Where zu goes

With a simple verb, zu stands directly before the infinitive:

• um das Problem zu lösen
• um länger zu schlafen

With a separable verb (a verb whose prefix can split off, such as aufstehen), zu goes between the prefix and the verb stem:

• aufstehen → um früh aufzustehen
• einkaufen → um Lebensmittel einzukaufen
• vorbereiten → um alles vorzubereiten

With an inseparable prefix such as be-, er-, ver-, or zer-, zu remains a separate word before the whole infinitive:

• verstehen → um den Text zu verstehen
• erreichen → um das Ziel zu erreichen

A verb phrase with two infinitives places zu before the final governing infinitive:

• Sie geht früh schlafen, um morgen länger arbeiten zu können.

This is grammatical, but German often prefers a damit clause when a modal verb such as können, müssen, or dürfen is important: Sie geht früh schlafen, damit sie morgen länger arbeiten kann.

Forming a damit clause

Damit is a subordinating conjunction (a linking word that sends the conjugated verb to the end of its clause). Its basic pattern is:

main clause, damit + subject + middle elements + conjugated verb

• Ich spreche langsam, damit alle mich verstehen.
• Wir schließen die Tür, damit es ruhig bleibt.
• Sie schreibt die Nummer auf, damit sie sie nicht vergisst.

A separable verb is not split when it stands at the end of a subordinate clause:

• Main clause: Der Bildschirm leuchtet auf.
• Purpose clause: Ich drücke den Knopf, damit der Bildschirm aufleuchtet.

If the verb has several parts, the finite verb normally occupies the final position:

• Ich erinnere ihn daran, damit er den Termin nicht vergisst.
• Wir fahren früh los, damit wir nicht lange warten müssen.
• Sie spricht deutlich, damit sie gut verstanden wird.

Putting the purpose first

Either construction can come before the main clause. A comma still separates the two parts. When a damit clause occupies first position, the finite verb of the main clause follows immediately after it:

• Damit niemand warten muss, beginnen wir pünktlich.
• Um niemanden zu wecken, schließt Ben die Tür leise.

This verb-first-after-the-comma pattern is normal German main-clause word order: the entire purpose clause or phrase fills the first position.

Punctuation

Always separate an um ... zu phrase or a damit clause from the main clause with a comma:

• Ich rufe an, um einen Termin zu vereinbaren.
• Ich rufe an, damit wir einen Termin vereinbaren können.

This comma is required in German, even where English punctuation may be optional.

Examples in Context

German	English	Note
Ich lerne Deutsch, um in Deutschland zu arbeiten.	I am learning German in order to work in Germany.	Same subject: ich learns and works.
Ich spare, um ein Auto zu kaufen.	I am saving to buy a car.	The subject of kaufen is understood as ich.
Nora stellt den Wecker, um früh aufzustehen.	Nora sets the alarm so that she can get up early.	Zu enters the separable verb aufstehen.
Wir nehmen die U-Bahn, um nicht zu spät zu kommen.	We are taking the subway so as not to arrive late.	Negation applies to the purpose action.
Er liest den Vertrag zweimal, um alles genau zu verstehen.	He reads the contract twice in order to understand everything precisely.	Inseparable verstehen: zu verstehen.
Um Energie zu sparen, schalten wir das Licht aus.	To save energy, we switch off the light.	The purpose phrase comes first.
Sie spricht langsam, damit die Gäste sie verstehen.	She speaks slowly so that the guests understand her.	Different subjects: sie and die Gäste.
Er arbeitet viel, damit seine Familie gut lebt.	He works a lot so that his family can live well.	The family has its own subject and verb.
Ich schreibe dir die Adresse, damit du dich nicht verirrst.	I am writing you the address so that you do not get lost.	Damit allows the subject du.
Wir machen das Fenster zu, damit das Baby schlafen kann.	We close the window so that the baby can sleep.	A modal verb is natural in the full clause.
Damit alle einen Platz bekommen, reserviert Jana einen großen Tisch.	So that everyone gets a seat, Jana reserves a large table.	Initial purpose clause; reserviert follows the comma.
Der Text wird vergrößert, damit er leichter gelesen werden kann.	The text is enlarged so that it can be read more easily.	Passive with a modal verb.

Common Mistakes

Using um...zu with a new subject

• Wrong: Ich öffne die Tür, um die Gäste hereinkommen.
• Right: Ich öffne die Tür, damit die Gäste hereinkommen.
• Why: Die Gäste is a new subject. An um ... zu phrase cannot contain its own stated subject or a conjugated verb.

Repeating the subject after um

• Wrong: Mia fährt mit dem Bus, um sie pünktlich anzukommen.
• Right: Mia fährt mit dem Bus, um pünktlich anzukommen.
• Why: The subject of anzukommen is already understood as Mia. Do not add sie.

Keeping main-clause word order after damit

• Wrong: Wir sprechen leise, damit das Kind kann schlafen.
• Right: Wir sprechen leise, damit das Kind schlafen kann.
• Why: Damit sends the conjugated verb, here kann, to the end.

Misplacing zu with a separable verb

• Wrong: Sie stellt den Wecker, um zu aufstehen.
• Right: Sie stellt den Wecker, um aufzustehen.
• Why: In a separable infinitive, zu goes between the prefix and stem: auf + zu + stehen.

Omitting the comma

• Wrong: Ich trainiere um gesund zu bleiben.
• Right: Ich trainiere, um gesund zu bleiben.
• Why: German requires a comma before an um ... zu purpose phrase and before a damit clause.

Confusing purpose with result

• Wrong meaning: Es regnete stark, damit die Straße nass wurde.
• Right: Es regnete so stark, dass die Straße nass wurde.
• Why: Rain does not normally have the intention of making a street wet. Damit expresses a goal; so ... dass expresses a result (“so ... that”).

Usage Notes

Damit can also have the same subject

The same-subject/different-subject distinction is the best practical rule, but it is not an absolute ban on damit when both subjects refer to the same person:

• Ich schreibe alles auf, damit ich nichts vergesse.
• Ich schreibe alles auf, um nichts zu vergessen.

Both are correct. The um ... zu version is more compact and is usually preferred when the shared subject is obvious. The damit version can make the subject explicit, give the purpose more emphasis, or provide a natural home for a modal verb.

English “to” is not always a purpose marker

Not every English to + verb describes purpose. Compare:

• I hope to see you. → Ich hoffe, dich zu sehen.
• I call to speak to the manager. → Ich rufe an, um mit der Managerin zu sprechen.

The first is an infinitive required by hoffen; it does not answer “what is the purpose of hoping?” The second states the purpose of calling and therefore uses um ... zu. Test whether “in order to” fits the intended meaning.

Position and emphasis

The purpose usually follows the action because that order presents cause and goal naturally. Placing the purpose first highlights the goal or sets up the reason for the following action: Um Zeit zu sparen, bestellen wir online. This order is common in instructions, advice, and formal writing, but it is also natural in speech.

Damit as a pronoun-like adverb

Not every damit introduces a purpose clause. In Ich öffne die Flasche damit, damit means “with it/with that.” You can identify the conjunction because it introduces a complete subordinate clause and sends its finite verb to the end.

Beyond the Basics / Advanced Use

Passive infinitives

An um ... zu phrase can contain a passive construction. The pattern is past participle + zu werden:

• Sie bewirbt sich früh, um zum Gespräch eingeladen zu werden.
  “She applies early in order to be invited to the interview.”

The subject is still shared: sie applies, and sie is intended to be invited. A completed passive infinitive is possible in the wider German infinitive system, but purpose normally points forward, so the present passive form is far more relevant here.

When the shared participant is not the main-clause subject

Careful formal usage favors an um ... zu phrase whose unstated subject is controlled clearly by the main-clause subject. Sentences with an impersonal main clause can become ambiguous or illogical:

• Awkward: Es ist nötig, früh zu buchen, um einen Platz zu bekommen.
• Clearer personal version: Man muss früh buchen, um einen Platz zu bekommen.
• Clear full clause: Es ist nötig, früh zu buchen, damit man einen Platz bekommt.

The awkward version is often understandable, but revising it makes the intended actor explicit.

Purpose nouns and alternatives

German can express the same relationship with a noun phrase, especially in concise or formal styles:

• zum Lernen — for studying
• zur Sicherheit — as a precaution / for safety
• zwecks Überprüfung — for the purpose of checking (formal and bureaucratic)

These do not replace um ... zu or damit in every context. They package the purpose as a noun rather than as an action clause. In everyday speech, the two core constructions are usually clearer and more flexible.

Purpose versus cause and result

Keeping three relationships separate improves both grammar and meaning:

Meaning	Connector	Example
Intended purpose	um ... zu / damit	Ich lerne, um die Prüfung zu bestehen.
Cause or reason	weil	Ich lerne, weil morgen die Prüfung ist.
Actual result	sodass / so ... dass	Ich lernte viel, sodass ich die Prüfung bestand.

A purpose can fail: Ich lernte viel, um die Prüfung zu bestehen, aber ich fiel trotzdem durch. The sentence remains logical because um ... zu describes an intention, not a guaranteed outcome.

Practice Tips

1. Use a two-subject check. Underline the person carrying out the main action and the person carrying out the intended action. If they differ, choose damit. If they are the same, first try um ... zu.
2. Transform pairs aloud. Start with Ich erkläre es langsam, damit du es verstehst. Then make the subjects match: Ich lese langsam, um alles zu verstehen. This forces you to practise both the subject choice and the word order.
3. Build a separable-verb list. Practise useful purpose phrases such as um früh aufzustehen, um einzukaufen, and um mich vorzubereiten. Mark the inserted zu visually until the pattern becomes automatic.

Related Concepts

• Prerequisite: Infinitive with zu — provides the infinitive structure used inside um ... zu phrases.