No, it's an adjective. It's modifying a noun. A. Sylvia, both are used, but the first is clearer. A. Jan, the doctor is correct concerning punctuation. Hello,I have some questions in relation to passive.
Farmers spray the trees each week.
The agent doesn't have to be at the end of the Verb Phrase. This is not actually what is happening in the sentences below, however. Farmers spray the trees each week. As for the remaining sentences, all of them are grammatical. However, I have no way of explaining why in a simple straight-forward way.