thunk
The past participle is had.
Done is the past participle.
The past participle is thought.
The past participle of the word "Find" is the word "Found."
The past participle of the word "pick" is "picked".
The past participle of the word "finish" is "finished."
Thought is already the past participle of "think".
The present participle of "think" is "thinking" and the past participle is "thought."
The past participle of "swear" is "sworn."
The past participle of the word 'fall' is 'fallen'.
The word "invited" is the past participle of invite.
The past participle is thought.