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过去完成时 interchange




翻译: (指两人等)交换, 切磋

过去完成时




过去完成时 (Past perfect)

I
had interchanged 
you
had interchanged 
he/she/it
had interchanged 
we
had interchanged 
you
had interchanged 
they
had interchanged 


不定式

interchange









规则动词 & 不规则动词