The past participle is challenged.
The word challenged is not a noun. The word 'challenged' is the past participle, past tense of the verb to challenge. The past participle of the verb is also an adjective.The word challenge is the noun form.Example: Are you up to the challenge?The noun forms of the verb to challenge are challenger and the gerund, challenging.
The past participle of do is done. The past participle of have is had.
The past participle of am is been. Not does not have a past participle
What is the past participle of do
The past participle of have is had....:) I have had...
Being is the present participle. The past participle is been.
The past participle is had.
The past participle is willed.
The past participle is been.
The past participle is thought.
To isn't a verb and so doesn't have a past participle. The past participle of be is been.
The past tense and the past participle is "answered".