Regular Verbs:
* Abandoned
* Abolished
* Absorbed
* Abstracted
* Accelerated
* Accepted
* Accused
* Acknowledged
* Acquired
* Adapted
* Added
* Admitted
* Advised
* Affected
* Affirmed
* Afraid
* Agreed
* Aimed
* Allowed
* Altered
* Amazed
* Ambushed
* Amounted
* Answered
* Appeared
* Applied
* Appointed
* Appreciated
* Approached
* Approved
* Argued
* Arrived
* Asked
* Assembled
* Assessed
* Assisted
* Assumed
* Attached
* Attacked
* Attempted
* Attended
* Attracted
* Authorized
* Avoided
* Awaken (sometimes "awaked" but less common)
Irregular Verbs:
* Awoken (past participle of "awaken")
* Beaten (past participle of "beat")
* Become
* Begun (past participle of "begin")
* Bent (past participle of "bend")
* Bet (past participle of "bet")
* Bidden (past participle of "bid" - formal/archaic usage)
* Bitten (past participle of "bite")
* Blown (past participle of "blow")
* Broken (past participle of "break")
* Brought (past participle of "bring")
* Built (past participle of "build")
* Burnt (past participle of "burn" - more common than "burned")
* Bought (past participle of "buy")
* Cast (past participle of "cast")
* Caught (past participle of "catch")
* Chosen (past participle of "choose")
* Come
* Cost
* Cut
* Done (past participle of "do")
* Drawn (past participle of "draw")
* Drunk (past participle of "drink")
* Driven (past participle of "drive")
* Fallen (past participle of "fall")
* Fed (past participle of "feed")
* Felt (past participle of "feel")
* Fought (past participle of "fight")
* Found (past participle of "find")
* Fled (past participle of "flee")
* Flown (past participle of "fly")
* Forbidden (past participle of "forbid")
* Forgotten (past participle of "forget")
* Forgiven (past participle of "forgive")
* Frozen (past participle of "freeze")
* Given (past participle of "give")
* Gone (past participle of "go")
* Grown (past participle of "grow")
* Had (past participle of "have")
* Heard (past participle of "hear")
* Hidden (past participle of "hide")
* Hit (past participle of "hit")
* Holden (past participle of "hold" - formal/archaic usage)
* Hurt (past participle of "hurt")
* Kept (past participle of "keep")
* Known (past participle of "know")
* Laid (past participle of "lay")
* Led (past participle of "lead")
* Left (past participle of "leave")
* Lent (past participle of "lend")
* Let (past participle of "let")
* Lie (past participle of "lie" - to recline)
* Lost (past participle of "lose")
* Made (past participle of "make")
* Met (past participle of "meet")
* Mistaken (past participle of "mistake")
* Overtaken (past participle of "overtake")
* Paid (past participle of "pay")
* Put (past participle of "put")
* Quit (past participle of "quit")
* Read (past participle of "read")
* Ridden (past participle of "ride")
* Risen (past participle of "rise")
* Run (past participle of "run")
* Said (past participle of "say")
* Seen (past participle of "see")
* Sought (past participle of "seek")
* Sold (past participle of "sell")
* Sent (past participle of "send")
* Set (past participle of "set")
* Shaken (past participle of "shake")
* Shone (past participle of "shine")
* Shot (past participle of "shoot")
* Shown (past participle of "show")
* Shut (past participle of "shut")
* Sung (past participle of "sing")
* Sunk (past participle of "sink")
* Sat (past participle of "sit")
* Slept (past participle of "sleep")
* Slung (past participle of "sling")
* Slit (past participle of "slit")
* Smitten (past participle of "smite")
* Spoken (past participle of "speak")
* Sprung (past participle of "spring")
* Stood (past participle of "stand")
* Stolen (past participle of "steal")
* Stuck (past participle of "stick")
* Stricken (past participle of "strike")
* Struck (past participle of "strike")
* Sworn (past participle of "swear")
* Swum (past participle of "swim")
* Taken (past participle of "take")
* Taught (past participle of "teach")
* Torn (past participle of "tear")
* Told (past participle of "tell")
* Thought (past participle of "think")
* Thrown (past participle of "throw")
* Understood (past participle of "understand")
* Upset (past participle of "upset")
* Waked (past participle of "wake" - archaic usage)
* Woke (past participle of "wake")
* Won (past participle of "win")
* Worn (past participle of "wear")
* Written (past participle of "write")
Please note:
* Some verbs have more than one past participle form, but one is often more common.
* A few verbs, like "awaken," have two past participles, one regular ("awaked") and one irregular ("awaken"), with the irregular form being more widely used.
* This list is not exhaustive, but it covers the most common verbs starting with "A".