What are the main rules for forming the past simple of regular verbs?

Past Simple - Regular Verbs

General Rule: Infinitive form + ed

Spelling Rules:

• a) When the verb ends in 'e', we only add a 'd'. Example: love → loved.
• b) When verbs end in consonant + vowel + consonant, the last consonant doubles. Example: stop → stopped.
• c) If the final syllable is not stressed, we do not double the final letter. Example: listen → listened.
• d) Verbs ending in a consonant, we change it into 'i' before adding 'ed'. Example: carry → carried.

Examples: