"Use" is a regular verb; therefore, its past participle is "used".
The past participle is used.
The past participle of the word "pick" is "picked".
The past participle is had.
Done is the past participle.
The past participle of the word "Find" is the word "Found."
The past participle is used.
"ridden" is the past participle of "rode"
The past participle of the word "pick" is "picked".
Said.
The past participle is had.
The word "it" does not have a past participle as it is a pronoun. It is only verbs that have a past participle.
The past participle is begun. For example: They had begun their homework when their mother got home.
The past participle of the verb to have is had.
Done is the past participle.
The past participle of the word "Find" is the word "Found."
The past participle of the word graduate is graduated
The past participle of the word 'fall' is 'fallen'.