Although the Simple Past tense is generally a written form, some verbs which are commonly used in speech, are also found in the Simple Past form in conversation.

These include:

Infinitive Form	Present Tense (3rd Person, sing)	Simple Past (3rd Person, sing)	Meaning
dürfen	darf	durfte	to be permitted
können	kann	konnte	to be able
mögen	mag	mochte	to like (someone, something)
müssen	muß	musste	to have to
sollen	soll	sollte	should, ought
wollen	will	wollte	to want (to)
wissen	weiß	wußte	to know (something)
werden	wird	wurde	to become
haben	hat	hatte	to have
sein	ist	war	to be