Simple past
Past participle
Base form
100

draw

drew

100

be

been

100

sang

sing

200

fly

flew

200

run

run

200

ate

eat

300

teach

taught

300

drive

driven

300

wrote

write

400

swim

swam

400

sleep

slept

400

found

find

500

understand

understood

500

come

come

500

drank

drink