The past participle of the verb "wear" is "worn."
The past participle of wear is worn.
The past participle of the verb "study" is "studied."
The past participle of the verb "be" is "been."
The past participle of the verb "develop" is "developed."
The past participle for "wear" is "worn."
The past participle of wear is worn.
The past participle of the verb "study" is "studied."
The past participle of the verb "develop" is "developed."
The past participle of the verb "be" is "been."
The past participle for "wear" is "worn."
visit is a regular verb so the past and the past participle are both verb + ed ievisitedvisited is the past participle of the verb visit.
By is not a verb and does not have participle forms; however, buy is a verb. The past participle is bought.
The past participle of the verb die is died.
It is the past participle of cleave.
There is no past participle. The idiomatic construction "have to" means "must" and is used as an auxiliary verb. (The verb to have has the past tense had and the past participle had.)
Invented is the past participle of the verb invent. verb /past /past participle = invent /invented /invented
The past participle of the verb to have is had.