The verb "lassen" — "to have something done" or "to let someone do something"

The verb "lassen" — "having something done" and "letting" someone do something

This guide explains the two related uses of the German verb lassen that learners most often mean by "having something done" and "letting" someone do something. You will learn what each use means, when to use it, how to form sentences (word order, cases, tenses, imperatives), and common mistakes to avoid. Examples are mainly in German with English translations.

What does "lassen" mean here?

Lassen has several meanings in German. This article focuses on two closely connected meanings:

- "to let / allow" (permit someone to do something)
- Example: Ich lasse dich gehen. (I let you go / I allow you to go.)

- "to have something done" (to arrange/cause that something is done by someone else — the so-called causative use)
- Example: Ich lasse mein Auto reparieren. (I have my car repaired / I get my car repaired.)

A quick way to tell them apart:
- If the person who does the action is mentioned as the direct object, lassen usually means "to let/allow" (person = accusative).
- Ich lasse meinen Bruder das Zimmer streichen. (I let / I have my brother paint the room.)
- If the thing that is acted on is the direct object, lassen usually means "to have something done" (thing = accusative).
- Ich lasse das Zimmer streichen. (I have the room painted.)

When do I use "lassen" to let (allow) someone do something?

Meaning and quick idea

Meaning: The subject gives permission or does not stop someone from doing an action.

Pattern: Subject (NOM) + lassen (conjugated) + person (ACC) + infinitive (bare, no "zu")

Examples:
- Ich lasse dich gehen. (I let you go.)
- Die Mutter lässt ihre Kinder draußen spielen. (The mother lets her children play outside.)
- Lass mich das ausprobieren! (Let me try that!)
- Lassen Sie mich kurz antworten. (Please let me answer briefly. — formal polite)

Tense and perfect
- Preterite: Er ließ mich nicht kommen. (He didn’t let me come.)
- Perfekt: Ich habe ihn gehen lassen. (I let him go.)

Imperative forms
- (du) Lass mich! (Let me!)
- (ihr) Lasst mich! (You (pl) let me!)
- (Sie) Lassen Sie mich bitte vorbei. (Please let me through.)

Notes
- The person who is allowed is in the accusative (dich, ihn, sie, meinen Bruder, etc.).
- The second verb is an infinitive and appears without "zu": correct = Ich lasse dich kommen. wrong = *Ich lasse dich zu kommen.
- When you allow a person to do something that affects an object, you can have two accusatives: Ich lasse meinen Sohn das Auto waschen. (I let/have my son wash the car.) Both meinen Sohn and das Auto are in accusative in this construction.

When do I use "lassen" to have something done (causative)?

Meaning and quick idea

Meaning: The subject causes or arranges that someone else performs an action on a thing. Often the actual performer (mechanic, painter, etc.) is not named.

Pattern: Subject (NOM) + lassen (conjugated) + thing (ACC) + infinitive (bare)

Examples:
- Ich lasse mein Auto reparieren. (I have my car repaired.)
- Er lässt die Wohnung streichen. (He has the apartment painted.)
- Wir lassen die Hecke schneiden. (We have the hedge cut.)

If the action is done to the subject’s body or possessions, German often uses a dative for the person and accusative for the body part or thing:
- Ich lasse mir die Haare schneiden. (I have my hair cut.) — mir = dative, die Haare = accusative
- Sie lässt sich die Zähne reinigen. (She has her teeth cleaned.)

To name the agent (who does the work):
- Ich lasse mein Auto von einer Werkstatt reparieren. (I have my car repaired by a garage.)
- Ich lasse das Dach vom Handwerker reparieren. (I have the roof repaired by the craftsman.)

Location instead of agent is common:
- Ich lasse mein Auto in der Werkstatt reparieren. (I have my car repaired at the garage.)

Tense and perfect forms
- Preterite: Ich ließ das Dach reparieren. (I had the roof repaired.)
- Perfekt (very common in speech): Ich habe mein Auto reparieren lassen. (I had my car repaired.)

Important note on the perfect: with the causative use you normally form the perfect with haben + object + infinitive + lassen. Do not use the past participle gelassen in this causative construction. Compare:
- Correct (causative perfect): Ich habe mein Fahrrad reparieren lassen. (I had my bike repaired.)
- Wrong: *Ich habe mein Fahrrad gelassen reparieren.

State vs. action:
- Ich lasse das Fenster offen. (I leave the window open — state.)
- Ich lasse das Fenster öffnen. (I have someone open the window — action.)

How do I form sentences with "lassen"? (word order, cases, tenses, conjugation)

Basic patterns (summary)

1) Let / allow someone:
- Subject (NOM) + lassen + person (ACC) + infinitive
- Ich lasse dich kommen. (I let you come.)

2) Have something done (causative):
- Subject (NOM) + lassen + thing (ACC) + infinitive
- Ich lasse das Auto reparieren. (I have the car repaired.)

3) Have someone do something (both person and thing):
- Subject + lassen + person (ACC) + thing (ACC) + infinitive
- Ich lasse meinen Sohn das Auto waschen. (I have/let my son wash the car.)

4) Body-part construction (dative + accusative):
- Subject + lassen + dative-person + accusative-body-part + infinitive
- Ich lasse mir die Haare schneiden. (I get my hair cut.)

Common confusion points and differences to watch for

Note the difference in subject perspective:
- Er lässt ihn gehen. (Someone (he) allows another person (him) to go.)
- Er darf gehen. (He himself has permission to go.)

Common mistakes (with corrections and short explanations)

Mistake: Using "zu" after lassen
- Wrong: *Ich lasse dich zu kommen.
- Correct: Ich lasse dich kommen.
- Why: lassen behaves like English "let" and takes a bare infinitive.

Mistake: Using gelassen in the causative perfect
- Wrong: *Ich habe mein Fahrrad gelassen reparieren.
- Correct: Ich habe mein Fahrrad reparieren lassen.
- Why: the causative perfect uses haben + object + infinitive + lassen.

Mistake: Mixing up state and action
- Wrong: *Ich lasse das Fenster öffnen. (when you mean "I leave the window open")
- Correct: Ich lasse das Fenster offen. (I leave the window open.)
- And if you mean action: Ich lasse das Fenster öffnen. (I have someone open the window.)

Mistake: Wrong case for the person
- Wrong: *Ich lasse meinem Sohn das Auto waschen. (meinem Sohn = dative)
- Correct: Ich lasse meinen Sohn das Auto waschen. (meinen Sohn = accusative)
- Why: the person being allowed or asked to do something is normally accusative in this construction.

Mistake: Word order in subordinate clauses
- Wrong: *Ich glaube, dass ich ihn lasse kommen.
- Correct: Ich glaube, dass ich ihn kommen lasse. (The infinitive comes before the conjugated "lasse." )

Useful example sentences (grouped by pattern)

Quick reference: short patterns to remember

- Let/allow: Subject + lassen + person(ACC) + infinitive
- Ich lasse dich arbeiten.
- Have sth done: Subject + lassen + thing(ACC) + infinitive
- Ich lasse mein Fahrrad reparieren.
- Have someone do sth: Subject + lassen + person(ACC) + thing(ACC) + infinitive
- Ich lasse meinen Sohn das Zimmer streichen.
- Body-part (get sth done for yourself): Subject + lassen + dative + thing(ACC) + infinitive
- Ich lasse mir die Haare schneiden.
- Perfect (causative): haben + object + infinitive + lassen
- Ich habe mein Fahrrad reparieren lassen.

Glossary (short and simple)

Final tips

- Ask yourself: Who is doing the action? If the person who acts is mentioned first (accusative person), you probably mean "let/allow". If the thing that is acted on is the object, you likely mean "have something done."
- Remember: no "zu" before the second verb.
- Practice the patterns with body-part sentences and with naming agents (von...) and places (in der Werkstatt) to get comfortable with case and prepositions.

If you want, I can give you more targeted examples (e.g., with common verbs like schneiden, reparieren, bringen) or a short list of exercises to test these patterns.