to step in
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to step in
To take over another person's tasks or role at short notice when they are unexpectedly unavailable. You help out by filling in for someone.
Meine Kollegin ist krank geworden, deshalb musste ich heute für sie einspringen.
My colleague got sick, so I had to step in for her today.
to recess
In architecture or geometry, for an edge or corner to recede inward, creating a re-entrant (concave) corner. This is a rare, technical meaning.
An der Fassade sieht man deutlich, wo die Mauerecke einspringt.
On the facade, you can clearly see where the wall corner recesses.
'Einspringen' is a separable verb. The prefix 'ein-' goes to the end in a main clause. In subordinate clauses and in the infinitive with 'zu', the verb stays together.
Ein Kollege springt morgen für mich ein.
A colleague is stepping in for me tomorrow.
The perfect tense of 'einspringen' (to step in) is always formed with the auxiliary verb 'sein'. This is because of the idea of movement into a new position or task.
Gestern ist spontan eine andere Pianistin für den kranken Solisten eingesprungen.
Yesterday, another pianist spontaneously stepped in for the sick soloist.
When you step in for a person, you always use the preposition 'für' followed by the accusative. You step in 'für jemanden' (for someone).
Kannst du am Freitag für mich einspringen? Ich habe einen wichtigen Termin.
Can you step in for me on Friday? I have an important appointment.
The meaning of an inward-facing corner is very rare and belongs to the technical language of architecture. In normal usage, you will hardly ever encounter this meaning.
Der Architekt erklärte, warum die Wand an dieser Stelle einspringt.
The architect explained why the wall recesses at this point.
to represent
Both words can mean that someone takes over the tasks of a person who is unable to do them. Einspringen, however, emphasizes spontaneous and usually temporary help, while vertreten describes serving as a substitute and can also be longer-term or more formal. Use einspringen for spontaneous help and vertreten for a regular substitute arrangement.
Als Frau Keller plötzlich krank wurde, sprang Herr Braun spontan für sie ein.
When Ms Keller suddenly fell ill, Mr Braun spontaneously stepped in for her.
Während Frau Keller im Urlaub ist, vertritt Herr Braun sie im Büro.
While Ms Keller is on vacation, Mr Braun is covering for her in the office.
