to sit - sat - have sat	to speak - spoke - have spoken	to spend - spent - have spent
to stand - stood - have stood	to take - took - have taken	to teach - taught - have taught
to tell - told - have told	to think - thought - have thought	to understand - understood - have understood
to wear - wore - have worn	to write - wrote - have written

doorbrengen (van tijd), uitgeven (van geld)	spreken	zitten
les geven, onderwijzen	nemen	staan
begrijpen	denken	vertellen
	schrijven	dragen