Ответ:

· We add -ed to most regular verbs: visited

· Verbs ending in -e + -d: loved

· Verbs ending in consonant + -y: change -y into -i + -ed: studied

· Verbs ending in vowel + -y: add -ed: played

· Verbs ending in one stressed vowel between two consonants, double the last consonant + -ed: stopped