be to blame,be to
问题描述：
be to blame,be to
（1）John,rather than his roommates,is to blame.
（2）I think mary,rather than Lucy,is to praise.
问：这两句话不是被动语态吗?为什么会用be to do?类似于这种形式的短语有哪些?
答
详阅：【不定式】to blame,to let,to seek,to rent,to find用【做表语】时,通常用主动表被动意义.例如：Who is to blame?该怪谁呢?She was in no way to blame.决不应该责备她.A better way is yet to seek..还得找...