英语高手请进,下面的这个选择题,请仔细分析每个选项正确或者错误的...

英语高手请进,下面的这个选择题,请仔细分析每个选项正确或者错误的...检举 | 2012-4-2 23:51 信步望星空 | 50 | 浏览次数：31次
All flights （）because of the terrible weather,they had to go there by train.
A:having been cancelled B:had been cancelled
C:having cancelled D:were cancelled
答：A
译：由于天气恶劣所有航班取消了,所以他们不得不改乘火车去那儿.
析：本题考查独立主格结构.
逗号后面的是主句,前面的是状语,从句应由连词引导,而句首没有连词,所以排除BD,因为这两个是谓语动词.
AC是现在分词的完成式,航班是被取消的,排除主动式C.having cancelled
非谓语动词作状语,其逻辑主语一般就是主句中的主语.如果不是,则需要在前面带上自己的,独立于主句主语之外的逻辑辑上的主语,这就是独立主格的“大部队”.
PS：如果用B,则有两种改法：
1.前面用从属连词As：As all flight had been cancelled.,they had to ...
2.中间用并列连词so:All the flights had benn cancelled...,so they had to .
如果用D也可以,前面用从属连词after:
After all the flights were cancelled.,they had to .