Here's the table with the past forms of the verbs:
| + -ed | repeat the consonant and add -ed | + -d | (-y) + -ied | irregular verbs |
| --------- | ------------------------------ | ------ | ---------- | ---------------- |
| happened | robbed | phoned | hurried | told |
| watched | stopped | smiled | carried | had |
| asked | planned | died | studied | went |
| cried | | lived | enjoyed | made |
| passed | | | | took |