exercise三种用法各造一个句子,exercise 与exercises 的区别及用法

网友回答

He does maths exercises every day
　　he do exercise every day
　　he exercises every day

网友回答

exercise 可以是动词“锻炼”，如 He exercises every day. 此时，exercises 是 exercise 的单三形式。
　　exercise 也可以是名词。
　　 （1）“练习”，“操”可数名词 如 There are many exercises in the book.
　　 We should do eye exercises.
　　 （2）“锻炼”，不可数名词 如 Let's take exercise.