see sb to do sth什么意思
我已经知道see sb do sth和see sb doing sth的区别(所以这两个不需要解释了).从没见过see sb to do sth.但是昨天看见一个题目,印象中好像是Could you hear her( )in the next room?A singsB to singCsinging据说答案选B.然后我查牛津字典发现有个例句是‘She was seen to enter the building about the time the crime was committed.'难道有see sb to do sth的用法,那又是什么呢?