to catch up
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to catch up
To reduce or completely make up a deficit, for example in a competition, in learning, or on a journey. You reach the same level as someone or something that previously had a lead.
Obwohl sie später gestartet ist, konnte sie die anderen Läufer schnell aufholen.
Although she started later, she was able to catch up with the other runners quickly.
to catch up on
To do something later that you missed or are behind on.
Am Wochenende muss ich den Schlaf der letzten Woche aufholen.
At the weekend I have to catch up on the sleep I missed last week.
'Aufholen' (to catch up) is a separable verb. The prefix 'auf-' goes at the end in a main clause. In subordinate clauses and in the infinitive with 'zu', the verb stays together.
Der Läufer holt den Führenden langsam auf.
The runner is slowly catching up with the leader.
The verb consists of the prefix 'auf-' and the base verb 'holen' (to fetch/get). While 'holen' means to bring something to oneself, 'aufholen' (to catch up) expresses the idea of closing a gap or distance.
Nach seiner Krankheit muss er viel Arbeit im Büro aufholen.
After his illness, he has to catch up on a lot of work at the office.
In the meaning of 'reducing a lead', 'aufholen' (to catch up) can be used with or without an object. With an object, you name the person or thing you are catching up with. Without an object, it simply means 'to reduce the distance.'
Sie muss ihre Konkurrentin noch aufholen.
She still has to catch up with her competitor.
When making up for something missed, 'aufholen' (to catch up on) is often combined with abstract nouns. Typical phrases are 'Schlaf aufholen' (to catch up on sleep), 'Arbeit aufholen' (to catch up on work), or 'Lernstoff aufholen' (to catch up on study material).
Am Wochenende will ich endlich den Schlaf der letzten Nächte aufholen.
At the weekend I finally want to catch up on the sleep I missed over the last few nights.
to catch up / obtain
Einholen and aufholen both describe someone reducing a lead. Aufholen usually emphasizes the process of catching up or narrowing the gap, whereas einholen tends to express actually reaching the person or thing ahead. Someone who is still closing the gap holt auf; someone who reaches them holt sie ein.
Durch ein schnelleres Tempo holte der Radfahrer auf die vorausfahrende Gruppe auf.
By increasing his speed, the cyclist caught up with the group ahead.
Nach zehn Minuten holte der Radfahrer die vorausfahrende Gruppe ein.
After ten minutes, the cyclist caught up with the group ahead.
