my question is that : Do we use present perfect continous when the situation took place in indefinited time as well as it is in present perfect ?
matthew22 indefinited I don't think we have this word in English. You may mean 'indefinite'. But then I don't know what 'indefinite time' is.
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matthew22indefinited
I don't think we have this word in English. You may mean 'indefinite'. But then I don't know what 'indefinite time' is. Maybe you mean 'unspecified time'. Yes, the present perfect (and the present perfect continuous) are both used when you do not specify a point in time when the action occurred.
matthew22