Imperative

             1. The imperative form of the verb is like the infinitive. It is used for:

-          INSTRUCTIONS AND DIRECTIONS

            Turn left, then take the first right.

            Sit down and listen carefully.

          ADVICES

          Wear comfortable clothes

            Buy a good road map

          OFFERS

            Have another biscuit.

            Please, help yourself to coffee.

        2. To form the negative use don’t

            Don’t turn left, turn right.

            Don’t drink any alchocal before you drive.