Wound is a regular verb so add -ed
wound / wounded / wounded
The past tense and past participle are both had.
The past participle of kill is killed.
The past participle is watched.
The past participle is known.
The past participle is gotten.
Both forms are 'wound'.
The past participle of "bled" is also "bled." For example, "The wound had bled for hours."
"Treated" is not a helping verb. It is a verb that can stand alone in a sentence without needing another verb to support its meaning. Helping verbs, on the other hand, are used alongside main verbs to add additional information about the action being performed.
The past participle of "am not" is "have not been."
The past participle of "do" is "done." The past participle of "have" is "had."
The past participle of the word "have" is "had."
The past tense and the past participle is "answered".
The past tense of "have" is "had," and the past participle is also "had."
The past and past participle for "buy" is "bought."
"Sold" does not have any past participle; it is the past participle of "sell".
The past participle of "was" is "been" and the past participle of "were" is also "been".
Being is the present participle. The past participle is been.