* Regular verbs form their past tense and past participle by adding "-ed" (or "-d" if the verb ends in "e"). Examples: walked, played, jumped.
* Irregular verbs do not follow this rule. They have unique, often unpredictable forms for their past tense and past participle. Examples: went, saw, done.
Why do we use "-ed" with irregular verbs sometimes?
* It's a mistake! People sometimes incorrectly use "-ed" with irregular verbs. This is a common error.
* Past participles are used in perfect tenses (e.g., "have seen", "had gone") and some passive voice constructions. Some irregular verbs have the same form for the past tense and the past participle, which can cause confusion. For example, "set" is both the past tense and past participle of "set", so it might appear to use the "-ed" ending.
Here are some examples of common irregular verbs and their correct forms:
| Verb | Past Tense | Past Participle |
|------------|-----------|-----------------|
| see | saw | seen |
| go | went | gone |
| do | did | done |
| eat | ate | eaten |
| say | said | said |
| come | came | come |
| take | took | taken |
To avoid errors, it's best to learn the correct forms of irregular verbs. You can find lists of these verbs online or in grammar books.