标题: 求 老prep 82题 分词形式 [打印本页] 作者: zzxl 时间: 2012-5-6 12:23 标题: 求 老prep 82题 分词形式 82. (28967-!-item-!-188;#058&003792) Each year companies in the United States could save as much as $58 billion annually by preventing illness among employees and gain as much as $200 billion through improving performance of workers if they simply provided offices with cleaner air. (A) annually by preventing illness among employees and gain as much as $200 billion through improving performance of workers if they simply provided (B) annually if they prevented employee illness and gain as much as $200 billion through worker performance improved by simply providing (C) annually in employee illness prevention and gain as much as $200 billion through worker performance improved by simply providing (D) in employee illness prevention and gain as much as $200 billion through improving performance of workers if they simply provided (E) by preventing illness among employees and gain as much as $200 billion through improved worker performance if they simply provided 答案上说，现在分词含有进行的意思，过去分词含有完成的意思。所以A不用improving，因为performance已经被提高，才造成收益。但是，前半句中节省不是也已经形成？为什么用preventing，不是也表示正在进行？作者: 1030430882 时间: 2014-4-29 20:09
求高人指点，我也不懂。。