Before you start

Meet ausbauen

Read how the verb is used, then write your own 10 sentences with it.

Build the meaning

aus- + bauen

aus-
outward, into a fuller or more developed state
bauen
to build

Build something out further so it becomes larger or more developed.

So ausbauen means to expand, extend, or improve.

A memory aid, not a rule: prefixes change meaning from verb to verb.

Learning approach inspired by this explanation in r/German.

Verb family

More verbs built on bauen

Same base verb, a different prefix, a new meaning.

Separable verb: aus·bauen

In a main clause the prefix aus splits off and goes to the end. After weil, dass and other subordinating words, the verb stays in one piece at the end.

Main clauseSie baut den Balkon aus.She is extending the balcony.
Subordinate clause…, weil sie den Balkon ausbaut.… because she is extending the balcony.
Participle: ausgebautzu-infinitive: auszubauen
Forms

How ausbauen changes

PronounPräsensPräteritum
ichbaue ausbaute aus
dubaust ausbautest aus
er/sie/esbaut ausbaute aus
wirbauen ausbauten aus
ihrbaut ausbautet aus
Siebauen ausbauten aus

Partizip II ausgebaut · Perfekt with haben

Three examples

  1. 1
    Die Stadt baut die Straße aus.The city is expanding the road.prefix goes to the end
  2. 2
    Wir haben unser Haus ausgebaut.We extended our house.Perfekt with haben
  3. 3
    Er muss den alten Motor ausbauen.He has to remove the old engine.verb after a modal