The main difference between regular and irregular verbs is in how they form their past tense and past participle forms.

Regular Verbs:

• Regular verbs follow a consistent pattern when forming the past tense and past participle.
• The past tense is typically formed by adding “-ed” to the end of the verb (e.g., walk -> walked, play -> played).
• The past participle is formed by adding either “have/has” + the “-ed” ending (e.g., have walked, has played).
• Examples of regular verbs include: walk, play, talk, wait, work.

Irregular Verbs:

• Irregular verbs do not follow the standard “-ed” pattern when forming the past tense and past participle.
• The past tense and past participle forms of irregular verbs must be memorized, as they are unique and do not follow a consistent rule.
• The past tense and past participle forms of irregular verbs are often quite different from the base form of the verb.
• Examples of irregular verbs include: be (was/were, been), see (saw, seen), go (went, gone), have (had, had), think (thought, thought).

The key distinction is that regular verbs follow a predictable pattern, while irregular verbs have unique, unpredictable forms that must be memorized individually.

Knowing the difference between regular and irregular verbs is important for proper grammar, conjugation, and the correct use of verb tenses in a language, especially for languages like English that have a significant number of irregular verbs.