verb·b1

warnen

To warn someone about danger or a possible problem

Ich warne dich.

Er hat uns gewarnt.

infinitivewarnen

to warn (infinitive)

present ichich warne

I warn / I am warning

present erer warnt

he warns

perfektich habe gewarnt

I have warned

prateritumich warnte

I warned (simple past)

imperativWarn!

Warn! (imperative)