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in the PONS Dictionary

I. under·per·ˈform VB intr

underperform
eine [unerwartet] schlechte Leistung erbringen
his boss says he's underperforming at work
sein Chef sagt, er bleibe bei der Arbeit hinter den Erwartungen zurück

II. under·per·ˈform VB trans

to underperform sth
hinter den Erwartungen zurückbleiben
to underperform the market
unter dem Marktdurchschnitt den Kurs steigern
Present
Iunderperform
youunderperform
he/she/itunderperforms
weunderperform
youunderperform
theyunderperform
Past
Iunderperformed
youunderperformed
he/she/itunderperformed
weunderperformed
youunderperformed
theyunderperformed
Present Perfect
Ihaveunderperformed
youhaveunderperformed
he/she/ithasunderperformed
wehaveunderperformed
youhaveunderperformed
theyhaveunderperformed
Past Perfect
Ihadunderperformed
youhadunderperformed
he/she/ithadunderperformed
wehadunderperformed
youhadunderperformed
theyhadunderperformed
See further verb tables

Examples from the PONS Dictionary (editorially verified)

to underperform the market
unter dem Marktdurchschnitt den Kurs steigern

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Look up "underperform" in other languages

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