You use the past tense of a verb (e.g. sang) when the subject is being talked about in the past (the simple past tense). You use the past participle (e.g. have/has sung) when the subject is being talked about in the present (the present perfect tense). "Sung" is the past participle and "have/has" is an auxiliary verb that implies that the subject is referring to a past action in relation to the current present state.
The past tense is was or were.The past participle is been.
All are past and past participle in tense.
Lead is present tense. The present participle is leading. Led is the past tense and past participle.
Past tense - was and were. Past participle - been.
The simple past tense is did. The past participle is done.
Has is the present tense, third person singular conjugation of have. The past tense and past participle of have is had.
The past tense of "have" is "had" and the past participle is also "had."
The past tense and past participle are both had.
Got is the past tense of get. Gotten is the past participle.
"Is" is the present tense, third person singular conjugation of be. The past tense is was, and the past participle is been.
Am is the present tense, first person singular conjugation of be. The past tense is was, and the past participle is been.
Strike is the present tense, and struck is the past tense and past participle.