we must be at the station to meet her为啥要加be?

we must be at the station to meet her为啥要加be? 新概念2.60课1.we must be at station to meet her为什么要有一个be?2.we ar （）to meet me at the station.ill be waiting there I had to meet my mother at the railway station as she ( ) be He says we were to meet him at the station. we will meet her at the station tomorrow 改为被动语态 We must be l------- to the school We must be kind to the old. harry up.He___for us at the station.A must wait B must be wa 请帮忙翻译一句话,I don’t have to meet her at the station. _____to meet me at the station,I'll be waiting there. at present there must be nothing we can do to prevent the ju