老PREP81 关于be动词省略的困惑

0815030128

In the major cities of industrialized countries at the end of the nineteenth century, important public places such as theaters, restaurants, shops, and banks had installed electric lighting, but electricity was in less than one percent of homes, where lighting was still provided mainly by candles or gas.
(A) electricity was in less than one percent of homes, where lighting was still
(B) electricity was in less than one percent of homes and lighting still
(C) there were less than one percent of homes with electricity, where lighting was still being
(D) there was less than one percent of homes that had electricity, having lighting that was still
(E) less than one percent of homes had electricity, where lighting had still been

答案A，我选的B
答案解释B错的原因：
(B) and lighting still provided省略了was,  因为这里was作为助动词,而前一个并列句的was是系动词,
功能不同,不能省略.
对于这个解释不是很理解，望NN指点迷津

0815030128

自己顶下先！

cocoloop

lighting was still provided mainly by candles or gas.这是被动句，was作为助动词与provided共同构成谓语，是不能省略的，否则意思改变。electricity was in less than one percent ..was做系动词，“是”的意思，后面接表语，助动词的was没有实际意思。

0815030128

lighting was still provided mainly by candles or gas.这是被动句，was作为助动词与provided共同构成谓语，是不能省略的，否则意思改变。electricity was in less than one percent ..was做系动词，“是”的意思，后面接表语，助动词的was没有实际意思。

-- by 会员 cocoloop (2011/3/3 22:19:37)

豁然开朗了，谢谢！

shishuyaun

CDE错哪里 能说下么