请帮我看看这两句英语,
问题描述：
请帮我看看这两句英语,
--I live near an qirport and passing planes can be hear night and day.这句英语中有can be 是什么时态?为什么会有be
--Over a hundred people must have been driven away from their homes by the noise.这句中的Over
答
1.can be heard：can hear的被动语态,因为是人听到过往飞机的声音
2.over=more than,超过