Jogging语法Jogging is a good way of exercise这个JOG 为什么要加ING ?请详

jog的ing形式要不要双写g（jogging）? One of the easiest ways to keep healthy is to do jogging:Jog jog的动名词形式是jogging,但是jogging本身就具有名词的意思,如take up jogging as a jogging Walking is good exercise,为什么walk要加ing? Along with jogging and swimming,cycling is one of the best a A good beginning is half of success 这里的 begin 为什么 要加ing walking is good exercise.为什么不加a? ing加法的 急drinking enough water is a good habit 为什么要加ING drink I am good--------jogging 填介词 Jogging and swimming are good for us jogging是什么意思?