The Participle
The third principal part of the English verb is called a "participle". Now listen closely; this is going to be an important definition: A participle is a "verbal adjective". That is, an adjective which is derived from a verb. In fact, that's why we call it a participle, because it "participates" in the essence of both a verb and of an adjective. So in the constructions of the English passive voice, the participle "seen" is actually "modifying" the subject of the verb "to be". I can say "Betty is tall" and "Betty is seen", and these two sentences are analogous. In the predicate of both these sentences the subject further modified, since it is linked to an adjective by the verb "to be". It may seem bizarre to be thinking of a verbal construction as being essentially adjectival, but watch how we can use participles where their adjectival force is quite obvious: "the w...