The simple past and past participle are both chased.
"Chased" already is the past particple of "chase". "Chased" has no past participle of its own.
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
The past participle of the word "have" is "had."
The past participle of "will" is "willed."
The past participle of "am, are, is" is "been."
The past participle of "to" is "been." The past participle of "be" is also "been."
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".