Exercise和exercises什么区别?

Exercise和exercises什么区别? do exercise和do exercises有什么区别? 英语：do exercise 和do exercises 有什么区别? exercise和exercises的用法 exercise与exercises有什么区别 exercise和exercises的区别?请举例 physical exercise 和physical exercises的区别是?何时用physical exercise,何时用physical exercises? exercise和exercises在这里的区别英语 more exercise 和 more exercises的区别 速求! healthy和health 到底啥区别额.还有 luck 和 lucky exercise 和exercises . do moring exercises 和 do some exercise 为什么一个加s 一个不加 in the morning do sport 和do Exercise一样么是do morning exercises 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… 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 take more exercise还是take more exercises 锻炼是take exercises 还是 take exercise take much exercises还是take much exercise exercise 与exercises 的区别及用法