Grammatical voice

Okay, imagine you're playing a game of pretend with your friends. You're playing as a dog and your friend is playing as your owner. If your friend says "I am walking the dog," they are using the active voice. This means that the "subject" (the person or thing doing the action) is doing something to the "object" (the thing being acted upon). In this case, your friend is the subject and they are walking you, the object.

Now, let's say you want to tell your friend to give you a treat. You could say "I want a treat," but you could also say "A treat is wanted by me." This is using the passive voice. This means that the subject is not doing anything, but instead, the action is happening to the subject. In this case, the action ("wanting a treat") is happening to you, the subject.

So, to sum it up, the voice (active or passive) is just a way of talking about who is doing the action in a sentence. If the subject is doing the action, it's active voice. If the subject is having the action happen to it, it's passive voice.