2. PRESENT SIMPLE PASSIVE We use the passive when we don't know who does the action, or when they aren't the main focus of the sentence. If we want to say who does the action we use by. We form the present simple passive with the correct form of the verb to be in present + the past participle.
3. EXAMPLES My chair is made of plastic. It isn't made of wood. These books are written in English. They aren't written in Spanish.
4. PAST SIMPLE PASSIVE We use the passive when we don't know who does the action, or when they aren't the main focus of the sentence. If we want to say who does the action we use by. We form the past simple passive with corret form of the verb to be in past simple + the past participle.
5. EXAMPLE Harry Potter was written by J.K Rowlling. It wasn't written by Shakespeare. These trainers were made in China. They weren't made in Spain.
