Составьте предложения в правильной форме

the teacher explains a new rule every week the teacher is explaining a new rule now the teacher has explained a new rule already the teacher explained a new rule last month the teacher has been explaining a new rule for an hour last Monday the teacher had been explaining  new rule by 5 o clock  yesterday the teacher will explain a new rule next month the teacher will be explaining a new rule tomorrow at 10 o clock the teacher will have been explained a new rule by the end of the next lesson