LZ,有一点请教一下,看PREP里面说: A. 即便表示转折对比,while也有”at the same time“的含义在里面,与then矛盾 while引导的从句要与主句发生在同一时间,可是wireless service has plummeted与主句不是同一时间发生的,用while错误,而且用as表示原因或伴随更为合适 请问这个WHILE引导了不同的时态这种用法对么 -- by 会员 andromedaa (2012/4/19 15:32:18)
while这个词我是这样理解的~~ 1表示同时,相当于when 2表示轻微转折(当然这个对比前后两者的转折,仿佛可能也含有一点at the same time的意味) 我在prep语法笔记里找到97/130题 来佐证 “while没有明确强烈的表示同时”
97. (29753-!-item-!-188;#058&003991)
Industrialization and modern methods of insect control have improved the standard of living around
the globe while at the same time they have introduced some 100,000 dangerous chemical
pollutants, having gone virtually unregulated since they were developed more than 50 years ago.
(A) while at the same time they have introduced some 100,000 dangerous chemical pollutants,
(B) while at the same time introducing some 100,000 dangerous chemical pollutants that have
(C) while they have introduced some 100,000 dangerous chemical pollutants at the same time,
(D) but introducing some 100,000 dangerous chemical pollutants at the same time that have
(E) but at the same time introducing some 100,000 dangerous chemical pollutants, having 这题正确答案为B ,说明while 可以和at the same time连用而不算作重复 而且这题后面的解释还有一段“
In writing, people often use a non-finite clause beginning with while. For example, instead of writing
“I often knit while I am watching TV.”, they write “I often knit while watching TV.”
连词 while 引导时间状语从句,有时可有成分省略(通常是在从句与主句的主语相同时,也可以说连
词引起一个单词或短语,如跟形容词、介词短语或现在分词等)。
而 but 是没有这种用法的。再者,but 表示转折含义。”
这里举得例句用的是while表示when的意思,你看表示同时尚且可以前后时态不完全一致(一般现在&现在进行),那是不是表示转折时也不用太严格的要求前后时态一致呢? 楼主所引用的那道题,因为要表达原因或伴随,as当然优于while。解释里对while的解释也有一定道理,那么来说说我考试遇到的那道题: 可能性1:我当时又脑子坏了,做错了。。(哈哈,很有可能哦) 可能性2:我做对了,因为其它选项实在是太错了。比如,前面while making……,success in basketball and baseball……像这样的选项明显逻辑主语不对直接确定错误啦~ 另外,补充一下,这道题还有although做引导词的,而且我觉得句意中的时态差别挺重要的,值得注意和考虑,请大家遇到题目时再仔细斟酌选择吧~ |