一道.Thechildrenarerequirednottoleavethebuildingunlesstodoso.A.beingtoldB.theywillbetoldC.betoldd.toldCD选项都是表被动,为什么选D,而不选C.过去分词表被动,这道题为什么选一个非谓语动词呢.

Question

一道
.The children are required not to leave the building unless____to do so .
A.being told B.they will be told C.be told d.told
C D选项都是表被动,为什么选D,而不选C.
过去分词表被动,这道题为什么选一个非 谓语动词呢.而C不行呢?

Answer 1

当主语一致时,可以省略主语谓语,是句子简练.
如：
Compared with the boys,the girls are more likely to stay at home.
和男孩比起来,女孩比较喜欢呆在家里.
其实是省略掉主谓,要主谓一起省略,不可以只省略主语.
（不省略）The girls are compared with the boys.The girls are more likely to stay at home.
是英语语法的一种用法.