请教高手！！！take exercise 还是take exercises, do exrcise还是do exercises? 为什么？？？

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.
打错了，是三单

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