标题: OG 84 询问 when 的用法和后置定语,再没人帮忙回答,我以后就不发了。。。发了好几个问题,只有两个人回,伤心。。。 [打印本页] 作者: Richardyu 时间: 2011-12-5 00:20 标题: OG 84 询问 when 的用法和后置定语,再没人帮忙回答,我以后就不发了。。。发了好几个问题,只有两个人回,伤心。。。 84.Often visible as smog, ozone is formed in the atmosphere from hydrocarbons and nitrogen oxides, two major pollutants emitted by automobiles, react with sunlight.
(A)ozone is formed in the atmosphere from
(B)ozone is formed in the atmosphere when
(C)ozone is formed in the atmosphere, and when
(D)ozone, formed in the atmosphere when
(E)ozone, formed in the atmosphere from
答案是B 疑问:1 when 不是只能做时间先行词吗?
2 E选项 Formed做ozone的后置定语不行吗?为什么说是fragment?只考虑fragment的问题,谢谢!!!作者: Tshirtzhe 时间: 2011-12-5 10:04
个人理解,仅供参考: 1. 把中间的modifier 去掉之后,简短的句子应该是:ozone is formed in the atmosphere when hydrocarbons and nitrogen oxides react with sunlight. 这里when 指的是当hydrocarbons and nitrogen 和太阳相互做用的时候。 我理解Manhattan里面说when 只能做时间先行词主要是针对 if 引导的条件状语,不能用when 代替 if.