They had drunk
He had written
He had taken
PS: Past Perfect
had + Ved/3 form
drink, write и take имеют третью форму, потому у них НЕТ окончания ed
They had drunk
He had written
He had taken
PS: Past Perfect
had + Ved/3 form
drink, write и take имеют третью форму, потому у них НЕТ окончания ed