Past Participle
forgive
forgiven
Where / she / just / be / ?
Where has she just been?
teach
taught
Why / they / discuss / about the trip?
Why have they discussed about the trip?
think
thought
How much money / he / spend in those collection figures?
How much money has he spent in those collection figures?
sweep
swept
Where / you / keep your agenda?
Where have you kept your agenda?
bite
bitten
How long / he / take guitar lessons?
How long has he taken guitar lessons?