exercise是可数名词吗

exercise既可以作可数名词，也可以作不可数名词。当exercise泛指“锻炼”时是不可数名词，比如take exercise（锻炼身体）；当exercise表示“体操”或“练习（题）”时是可数名词，其复数形式为exercises，比如do eye exercises（做眼保健操）。

You are probably well enough to take a little light exercise.

你恢复得不错，大概可以做些轻微的运动了。

I don\'t get much exercise sitting in the office all day.

我整天坐在办公室很少运动。

The mind needs exercise as well as the body.

大脑同身体一样需要锻炼。