agree-agrees-agreeing-agreed
run-runs-running-run
make-makes-making-made
take-takes-taking-took
study-studies-studying-studied
cry-cries-crying-cried
arrive-arrives-arriving-arrived
stop-stops-stopping-stopped
wash-washes-washing-washed
lie-lies-lieing-lied(lie-lies-laying-lay
pass-passes-passing-passed