do exercise 加s么?

do exercise 加s么? do exercise什么时候加s? do exercise用加s吗 do exercise什么情况加S to do some exercise 为什么exercise 后面不加S啊 morning exercise可数吗 那do morning exercise要加s吗 I will do more exercise every day为什么exercise不加s?do morning exercises every day为什么这里exercise又加s? do moring exercises 和 do some exercise 为什么一个加s 一个不加 do a lot of grammer exersices中为什么exercise要加s是 grammar exercise什么时候加sdo morning exercise还是do morning exercises exercise何时加s何时不加? exercise何时加s何时不加? she ofen exercise.exercise加s吗?she exercise twice a week.exerse加s吗? exercise的用法加s与不加分别有什么用法,举出一些词组谢do any exerciseneed to exercise moreexercise都是什么意思 为什么 favorite exercise中exercise不用加s You'd better do morning_every day.It's good to have lots of_.A exercise,exercise B 加s,原型 C 原型 Let's do ______ (some) exercise ,OK 关于exercise的用法morning exercise和eye exercise后要不要加“s”