practise与exercise区分It is no good learning without practise.practise后面为什么不加s? 2.She is doing spelling exercises . 为什么不是practise?

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practise与exercise区分It is no good learning without practise.practise后面为什么不加s?  2.She is doing spelling exercises .        为什么不是practise?

practise与exercise区分It is no good learning without practise.practise后面为什么不加s? 2.She is doing spelling exercises . 为什么不是practise?
practise与exercise区分

It is no good learning without practise.
practise后面为什么不加s?

  2.She is doing spelling exercises .
        为什么不是practise?

practise与exercise区分It is no good learning without practise.practise后面为什么不加s? 2.She is doing spelling exercises . 为什么不是practise?
practise 着重于实践,实习.exercise着重于练习,一般作业练习都用这个词.exercises还可以是身体练习,比如体操等等.practise就不能这么用.
It is no good learning without practise.加s其实也可以,没有语法错误.估计是因为learning是单数,所以后面的practise也就用单数了.
pelling exercises和spelling practise可以通用.