exercise和exercises的用法

exercise和exercises的用法 physical exercise 和physical exercises的区别是?何时用physical exercise,何时用physical exercises? exercise和exercises的区别?请举例 Exercise和exercises什么区别? exercise和exercises在这里的区别英语 more exercise 和 more exercises的区别 速求! 关于exercise,exercises的用法We do morning ____everymorning.And we do _____after school.A.exercises; exercises B.exercises; exercise C.exercise; exercises并请翻译一下 exercise 与exercises 的区别及用法 exercise 与exercises 的区别及用法 do more exercises,do more exercise,do some exercise,do some exercises的区别 exercise 和 exercises的区别?do morning exercises是做早操?do morning exercise是早锻炼?do exercises到底是锻炼还是做习题- -我凌乱了求解释… My sister exercises in the park every morning .你说把exercises和do erercise都对.可是My sister 是第三人称单数可以用do exercise 真的很麻烦, do exercise和do exercises有什么区别? 英语：do exercise 和do exercises 有什么区别? doing morning exercise is good for our health中,为什么要用is和health?doing morning exercise is good for our health中,为什么要用is和health?doing morning exercise和morning exercises中的exercise各是什么词性?also和other的区别 take exercise和take exercises的区别 do exercise和do exercises的区别 请逐一回答请写出汉译和区别，3Q要标准的，最好是老师讲的 做早操的英文是exercise还是exercises do exercise 和do exercises的区别看到很多种不同的答案,希望有个比较权威的答案