completed是过去分词,表被动和完成的意义,它的逻辑上的主语就是后面的the library .when是从句连词,引导了时间状语部分.从句连词后面不可以接不定式.
完整的句子是：when it is completed,the library will be open to the public on 2013.主将从现
when ____,the library will be open to the public on 2013.
when ____,the library will be open to the public on 2013.
A completed B to be completed
为什么是A,不能是B.
A completed B to be completed
为什么是A,不能是B.
英语人气：994 ℃时间：2020-04-14 01:47:35
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