There is no present tense form of the verb "laugh" that includes a past participle of "laugh" except in a strained passive voice construction such as, "His reply was loudly laughed".
Lead is present tense. The present participle is leading. Led is the past tense and past participle.
The simple past and past participle is laughed.
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.
Pulled is the past tense and past participle of pull. Pulling is the present participle.
The present participle is laughing. The past tense is laughed. The past participle is laughed.
Laughed
Lead is present tense. The present participle is leading. Led is the past tense and past participle.
The simple past and past participle is laughed.
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.
Pulled is the past tense and past participle of pull. Pulling is the present participle.
The past tense is bit. The present participle is biting. The past participle is bitten.
The past tense and past participle is equipped; equipping is the present participle.
The past participle is done. The simple past tense is did. The present participle is doing.
Laughed is the past participle (as well as the simple past tense).
The present tense is "come". The past participle is "come", as well. "Came" is the past tense.