标题: 加have been的必要性? [打印本页] 作者: maxiv 时间: 2011-4-11 18:25 标题: 加have been的必要性? 原句: Tobacco companies, shaken by a string of legal setbacks in the United States, but which retain strong growth prospects in the developing world, face an uncertain future.
答案: Tobacco companies, WHICH have been shaken by a string oflegal setbacks in the United States , but WHICH retain strong growth prospects in the developing world, face an uncertain future.
有点不明白为什么黑体字的部分,不能直接写成”which shaken“,而一定要写which have been shaken呢?作者: aeoluseros 时间: 2011-4-11 19:45
1. 如果前后两个定语从句内都是一般现在时,那么这个句子可以简写为: Tobacco companies, shaken by a string of legal setbacks in the United States but retaining strong growth prospects in the developing world, face an uncertain future. 2. 用了现在完成时只是表达了“一直震荡到现在”的含义,不一定非要这个含义的,所以也不一定非要用现在完成时这么写,也可以用一般现在时、一般过去时等等。 3. 后面的by a string of legal setbacks表明了使得Tobacco companies动荡的原因,所以要用被动语态。作者: maxiv 时间: 2011-4-12 10:27
也就是说最关键的理由 是因为你说的第三点,被动语态,所以加了have been了作者: lonelyorchid 时间: 2011-4-12 11:59
楼主好资质呀,这样都能懂? 那我倒有几个问题请教一下: 过去分词做后定不表示被动么?比如 shaken 和 being shaken,这两个不表示被动? 为啥表被动就一定要 have been shaken? 还有,句中的but又是个什么东西?表示什么和什么的转折?和前一个定语的转折?but后面的which为什么指的又是远在两个逗号以前的companies?GMAT里貌似没有这样的语法。。。作者: Gail小M 时间: 2011-4-12 13:26
根据原句和答案的句子就补充一小点吧.
the STRUCTURE in the answer chioce is better than in the original sentence. but: link two parallel <in structure> modifies (opposite in the logic of meaning) to describe the subject Tobacco companies.clear parallelism is a key factor in determining the true answer.
it is better than the expression of " shaken by a string of legal setbacks in the United States"作者: 草鱼1991 时间: 2018-11-30 19:35
Which was shacken 是不是也没毛病?
区别在于语义,现在完成时更好的诠释这句话?