John was so sleepy that he counld hardly keep his eyes ( ? )A open B to be opened C.to open D. opening答案是a不是说keep doing帮我解世一下
热心网友
A open Keep不光可跟doing,还可以跟形容词，Open动词也是它，形容词也是它，所以选A
热心网友
open在这里是形容词，你说的短语是针对动词而言的，如keep talking
热心网友
这个keep+adj.是表示状态，open在这里是形容词，意思是张开的