Distinguishing the structures um...zu and zu + infinitiv in German

In German, um...zu and zu + Infinitiv are two similar structures. Confusion between these two structures is common among German learners. So how do we distinguish between them? In today's article, we will explore this together!!!

1. zu + Infinitiv

- Does not express a specific purpose; used to narrate, express, or make judgments about emotions, etc.

- Recognizing signs of zu + infinitiv (infinitive verb):

+ After certain verbs expressing wishes, thoughts, intentions, emotions, or the beginning or end of an action (anfangen, aufhören, sich entscheiden, planen, vergessen, versuchen, vorhaben, vorschlagen…). Example:

Ich habe vergessen, die Hausaufgaben zu machen.

(I forgot to do the homework.)

→ Simply narrates the fact of forgetting to do homework, without expressing a clear purpose.

+ After adjectival phrases: sein/finden + Adjektiven (anstrengend, gut, interessant, langweilig, schön, spannend, wichtig…)

Es ist langweilig, den ganzen Tag am Strand zu sein.

(It's boring to be at the beach all day.)

→ Only expresses an emotional judgment and does not state any specific purpose.

+ After noun phrases: haben/machen + Nomen (Lust, Zeit haben, Spaß …)

Ich habe keine Zeit, ins Reisebüro zu gehen.

(I don't have time to go to the travel agency.)

→ Expresses a complaint, without stating any specific purpose.

!!!! Note: structures used with an infinitive but without zu:

  + Modal verbs: müssen, sollen, möchten, dürfen, wollen, können.

  + Special verbs: "bleiben", "lassen"

   + Verbs of perception: "sehen", "hören",...

   + Sentence structures with the auxiliary werden: Futur I, Konjunktiv II2\. um …zu

- Used to indicate purpose, answering the question Wozu? or Wofür?. To use um…zu, the subject in the main clause must be the same as the subject in the um…zu structure. For example:

Wozu lernst du Deutsch? (What are you learning German for?)

Ich lerne Deutsch, um in Deutschland studieren zu können. (I am learning German so that I can study in Germany.)

→ My purpose for learning German is to be able to study in Germany. The um….zu structure expresses a clear, specific purpose.

- The subject in the um…zu structure can be omitted:

Ich arbeite so viel, um ich die Rechnung bezahlen zu können.

= Ich arbeite so viel, um die Rechnungen bezahlen zu können.