The city of Xi'an _____(become) cleaner and cleaner

问题描述:

The city of Xi'an _____(become) cleaner and cleaner
为什么不是被动?

become作为系动词时没有被动语态become作为系动词时,通常后面接形容词,意思为变得,变成.作为动词时,后面接名词,意思是成为.例如:I become unfamiliar wtih them.我对它们有些生疏了.unfamiliar adj.His wish is to ...