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现在完成进行时 stave






现在完成进行时

I have been staving



现在完成进行时 (Present perfect continuous)

I
have been staving 
you
have been staving 
he/she/it
has been staving 
we
have been staving 
you
have been staving 
they
has been staving 


不定式

stave









不规则动词