exercise作"运动；锻炼"讲时，是不可数名词，do／take exercise＝do sport意为"进行运动；锻炼身体"。如：Every morning I get up at seven I do some exercise and have a light breakfast.(我每天早上七点钟起床，锻炼一下身体，然后吃早饭。)当exercise作"做操，练习"讲时，它是可数名词。
exercise作"运动；锻炼"讲时，是不可数名词，do／take exercise＝do sport意为"进行运动；锻炼身体"。如：Every morning I get up at seven I do some exercise and have a light breakfast.(我每天早上七点钟起床，锻炼一下身体，然后吃早饭。)当exercise作"做操，练习"讲时，它是可数名词。
