begin -began
-begun
come - came - come
become -
became - become
do - did -
done
build -
built - built
speak -
spoke - spoken
say - said
- said
understand
- understood - understood
know - knew
- know
grow - grew
- grown
go - went -
gone
ride - rode
-ridden
drive - drove
leave -
left - left
sleep
- slept - slept
write - wrote - written
shoot - shot - shot
sing - sang
- sung
throw - threw - thown
swim - swam
- swum