请帮我看看这两句英语,--Ilivenearanqirportandpassingplanescanbehearnightandday.这句英语中有canbe是什么时态?为什么会有be--Overahundredpeoplemusthavebeendrivenawayfromtheirhomesbythenoise.这句中

Question

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

Answer 1

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