Final -ed: Passive Voice
In the passive voice, a form of the auxiliary to be is used with the past participle of a main verb. If the main verb is regular, it will end in -ed in the passive voice.Soon the yard will be cleared and Sophie will be happy to see how carefully the trees were pruned.Remember that the passive voice indicates a sentence structure in which the subject isn't performing the action of the sentence. (See Chapter 2.) Notice in the sentence above that the time of the verb is marked by the auxiliary, not by the main verb. The main verb is always in its past participle form, no matter what time the verb is expressing.