Put the verbs into the correct group. For irregular verbs, write their three forms.

Regular verbs: to happen, to get, to like, to show, to start, to smash, to keep, to stop, to pay.

Irregular verbs: to do (do, did, done), to be (be, was/were, been), to go (go, went, gone), to hide (hide, hid, hidden), to have (have, had, had), to climb (climb, climbed, climbed).