6.I need wear a worm coat. I needn’t wear a worm coat. 7.The old man always goes for a walk in the park after supper. The old man seldom goes for a walk in the park after supper. 8.The doctors volunteer in the countryside every year. The doctors don’t volunteer in the countryside every year. 9. Mike does sports in the afternoon. Mike doesn’t do sports in the afternoon. 10.You’d better talk with your parents right now. You’d better not talk with your parents right now.