group 1
sleep
slept
think
thought
know
knew
sit
sat
feel
felt
bring
brought
fly
flew
sing
sang
build
built
keep
kept
fight
fought
throw
threw
drink
drank
spend
spent
sweep
buy
bought
grow
grew
give
gave
send
sent
think
thought
catch
caught
blow
blew
swim
swam
lend
lent