Past Tense:
* was (for singular subjects: I, he, she, it)
* were (for plural subjects: we, you, they)
Past Participle:
* been
Examples:
* Past Tense: I was at the store yesterday. They were happy to see us.
* Past Participle: I have been to Paris twice. They have been friends for years.
Important Notes:
* The verb "be" is irregular, meaning it doesn't follow the standard pattern of adding "-ed" to form the past tense.
* The past participle "been" is used with the auxiliary verbs "have" and "had" to form perfect tenses (e.g., "have been," "had been").