Regular:
to hate-hated-hated
to love-loved-loved
to invite-invited-invited
to discuss-discussed-discussed
to enjoy-enjoyed-enjoyed
to start-started-started
to argue-argued-argued
to visit-visited-visited
Irregular:
to sleep-slept-slept
to have-had-had
to spend-spent-spent
to buy-bought-bought
to lose-lost-lost
to find-found-found
to cut-cut-cut
to begin-began-begun
to put-put-put
to go-went-gone
to leave-left-left