keep doing和keep sth do
问题描述:
keep doing和keep sth do
I was so tired that i couldn't keep my eyes ______.A.opening B.open C.opened D.to open.
为何选B而不是选A?
答
B
keep sth.+形容词 把...保持在...状态
类似有:keep one's eyes open;keep one's eyes closed
因为open本身可以作为形容词,而close作形容词是"近"的意思,所以加ed,用过去分词作形容词.