ประโยคปฏิเสธ

                  1. He isn't putting his  shoes on.

                    2. We aren't  shutting the windows.

                    3. She  isn't  taking her hat off.

                    4. The children aren't playing games.

                    5.  The sun isn't shining.

                    6. The cars  aren't moving.

                    7. The firemen aren't climbing up a  ladder.

                    8. The farmers aren't digging a big hole.

                    9. The plane isn't flying ten thousand feet.

                  10. Her father isn't doing his best.