分词作状语和定语的时候该怎么区分？

1.现在分词短语【作定语】相当于一个【非限定性定语从句】，用逗号隔开。
2.现在分词短语【作定语】相当于一个【定语从句】，不用逗号隔开。
3.分词作结果状语从句可以不用逗号隔开，因为根据句意一目了然。
4.(1).The study,conducted by Mrs,is seeking for the true reason of such phenomena.
=The study,which is conducted by Mrs,is seeking for the true reason of such phenomena.
(2).The study conducted by Mrs is seeking for....
=.The study which is conducted by Mrs is seeking for the true reason of such phenomena.
(3).Conducted by Mrs,the study is seeking for....
=As it is conducted by Mrs, the study is seeking for the true reason of such phenomena.
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第一句是分词做非限制性定语相当于一定语从句，改写为The study ,which was conducted by Mrs,is seeking for the true reason of such phenomena.
你所问的定语和状语逗号的问题。非限制性定语要用逗号和句子的其它部分隔开。结果状语可用逗号隔开也可不用。

亲爱的楼主，其实如果您要区分的话很简单，就是当现在分词做壮语时，一般放在主句的前面或最后，而且有的会用，隔开
而现在分词做定语是一般位于名词之后，与名词间构成被动关系