Can is an auxiliary verb it has a past -- could -- but doesn't have a past participle.
The past tense of "can" is "could," and the past participle is also "could." For example: I could help you yesterday (past tense), and I have could help you before (past participle).
The past tense is was or were.The past participle is been.
Present tense: lead Present participle: leading Past tense: led Past participle: led
The past tense of "being" is "was" and the past participle is "been."
The simple past tense is did. The past participle is done.
The past tense of "has" is "had" and the past participle is also "had."
The past tense is was or were.The past participle is been.
The past tense of "being" is "was" and the past participle is "been."
The simple past tense is did. The past participle is done.
The past tense of "has" is "had" and the past participle is also "had."
Present tense: lead Present participle: leading Past tense: led Past participle: led
The past tense and past participle are both had.
The past tense of "have" is "had" and the past participle is also "had."
Past tense: bit Present participle: biting Past participle: bitten
Present participle: pulling Past tense: pulled Past participle: pulled
Present tense: strike Past tense: struck Past participle: struck
Present tense: am Past tense: was Past participle: been
All verbs have a past tense form and a past participle form. For regular verbs, the past tense and past participle ends in -ed.Example:walk (present tense) walked (past tense and past participle)Irregular verb do not have the -ed ending.Example:run (present tense) ran (past tense) run (past participle)