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in the PONS Dictionary

pre·form [ˌpri:ˈfɔ:m, Am ˈfɔ:rm] VB trans

to preform sth
Present
Ipreform
youpreform
he/she/itpreforms
wepreform
youpreform
theypreform
Past
Ipreformed
youpreformed
he/she/itpreformed
wepreformed
youpreformed
theypreformed
Present Perfect
Ihavepreformed
youhavepreformed
he/she/ithaspreformed
wehavepreformed
youhavepreformed
theyhavepreformed
Past Perfect
Ihadpreformed
youhadpreformed
he/she/ithadpreformed
wehadpreformed
youhadpreformed
theyhadpreformed