标题: 一个疑问 [打印本页] 作者: wyw1018 时间: 2012-9-6 04:10 标题: 一个疑问 A recent poll of elected officials suggests that candidates, when in the midst of a tough campaign, often make statements about an opponent that they may not think is true.不说这道题的画线部分，而说这道题的未划线部分when in the midst of a tough campaign，在各种资料上，特别是CD的prep资料都强调when，after，while，although等后面不能接介词短语和名称短语，能接形容词短语，V-ing和V-ed形式，唯一能接介词短语的是once。当然这道题这里并未划线所以无需考虑，可是假如这道题此部分画线呢？选项有a：when in the midst of a tough campaign b：when they are in the midst of a tough campaign 该如何选？作者: jeffery2541 时间: 2012-9-6 07:06
状语从句省略后产生的直观现象就可能是你所说的when后面直接接介词短语了。