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."
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.
The past participle of the verb "occur" is "occurred."
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."
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.
The past participle of the verb "occur" is "occurred."
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 to do is "done."
It is the past participle of cleave.
The past participle of the verb die is died.
With phrasal verbs like hand in the verb part - hand - changes to show tense.The verb hand is a regular verb so to make past participle add -ed = handed.Then the past participle of hand in is handed in
Yes, "pumped" is a past participle form of the verb "pump." It is used in verb phrases like "have pumped" or "were pumped."
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.)