Because all the roads leading to the mountain village ( )
问题描述:
Because all the roads leading to the mountain village ( )
the rescue workers were not able to reach it to help.
A.were blocked
B.are blocked
C.have been blocked
D.had been blocked
为什么用一般过去时不用现在完成时
答
一般过去时:过去已经发生的事情 动作
现在完成时:截止说话的时候已经完成的动作 事情
跟据语法解释 看上去这两个都对,实际上也是这样的,不过现在完成时一般需要有明确的对象,比如 我曾经去过美国3次 就可以用现在完成时 因为有 “我” 这个明确的对象all the roads leading to the mountain village
一整个句子不就是对象了吗?