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标题: 想请教一类插入语语法，一直没想通 [打印本页]

作者: vipraymond 时间: 2013-12-16 00:14
标题: 想请教一类插入语语法，一直没想通
句子：

Thirty rare gases, most of them industrial by-products, threaten to warm the Earth's atmosphere.

这里的most of them industrial by-products这个插入语是怎么回事？既不是同位语，也不是Ving，Ved表伴随。

此类语法困扰我很久了，求大神指点

类似的还有下面这道题的D选项，many companies unable to pass on higher costs也是这种插入语：

184. As measured by the Commerce Department, corporate profits peaked in the fourth quarter of 1988 and have slipped since then, as many companies have been unable to pass on higher costs.

(A) and have slipped since then, as many companies have been unable to pass on higher costs

(B) and have slipped since then, the reason being because many companies have been unable to pass on higher costs

(D) but, many companies unable to pass on higher costs, they have slipped since then

(E) yet are slipping since then, because many companies were unable to pass on higher costs

作者: wyw1018 时间: 2013-12-16 14:02
高中语法知识，独立主格。

作者: enkyklios 时间: 2013-12-16 14:30
是啊，这是高中最喜欢考的东西

作者: vipraymond 时间: 2013-12-19 00:14
哇！！！太感谢了！！我完全不记得高中学过这个了

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