英文 前面过去式 后面未来式
问题描述：
英文 前面过去式 后面未来式
She was so frightened that she ________________________.
A.couldn't speak
B.won't be able to speak
两个只能选一个,B是成立的吗?这样前面过去式,后面未来式可以吗
还是wouldn't才是对的?
答
时态要一致
所以 couldn't
和 wouldn't be able to
都可以