Hi Clara, Passive Structure is formed as follows : to be+ past participle. For example, the apples were eaten by the kids. It is possible to use "to be" in different tenses depending on the context. With present simple, for instance, the floors are built from stone. Hope that helped!

Hi Clara, Passive Structure is formed as follows : to be+ past participle. For example, the apples were eaten by the kids. It is possible to use "to be" in different tenses depending on the context. With present simple, for instance, the floors are built from stone. Hope that helped!