
Originally Posted by
rewboss
To be sure, "appreciated" doesn't modify the verb (since it is not intended to indicate that the action is performed in an appreciative manner, or in a manner which is appreciated); rather, it complements the verb.
But to prove that things are never as simple as they seem, this construction could be analysed in different ways.
You could say that "appreciated" is a passive adverbial. Or you could say that the whole sentence is a straightforward passive, and that "appreciated" is simply the past participle of "appreciate":
Someone eats the cake. (Active)
-> The cake is eaten (by someone). (Passive)
We appreciate your help. (Active)
-> Your help is appreciated (by us). (Passive)