eautiful:more beautiful,the most beautiful slowly:more slowly,the most slowly thin:thinner,the thinnest beautiful:This flower is more beautiful tham that one. This picture is the most beautiful one I have ever seen. slowly:I move more slowly while riding a bike than driving a car. Perhaps turtles are the most slowly animals in the world. thin:She is thinner than me because she love sports. She is the thinnest student in our class.