be+名词+to+动词 这是什么结构啊例如the girl was able to explain what had happened to her.
问题描述：
be+名词+to+动词 这是什么结构啊
例如the girl was able to explain what had happened to her.
答
be able to 意思相当于 can,可以,能够得意思
不是be+名词+to+动词