play-playing
watch-watching'
study-studying
take-taking
stop-stopping
wait-waiting
begin-beginning
give-giving
have-having
make-making
meet-meeting
lie-lying
put-putting
fight-fighting
sing-singing
stand-standing
say-saying
spend-spending
play-playing
watch-watching'
study-studying
take-taking
stop-stopping
wait-waiting
begin-beginning
give-giving
have-having
make-making
meet-meeting
lie-lying
put-putting
fight-fighting
sing-singing
stand-standing
say-saying
spend-spending