Industrialization and modern methods of insect control have improved the standard of living around the globe but introducing some 100,000 dangerous chemical pollutants at the same time that have gone virtually unregulated since they were developed more than 50 years ago.
语法 Sentence Correction-3244
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正确的用户笔记
xx2312345X 2016-05-19 16:21:49
but要连接两个句子（FANBOYS），而关键是while不同！！！SV while ING也行
cocowu 2014-07-22 16:50:30
WHILE 解的是同時之間不是相反的意思
cocowu 2014-07-22 18:58:28
"but" is a coordinating conjunction. it's in the same category as "and" and "yet". this type of conjunction demands PARALLELISM between the things that appear on either side of it. that doesn't happen in choice (d). the left hand side is "have improved...", which is an actual VERB. the right hand side is "introducing...", which is NOT a verb (it's just a participle). these are not parallel.
停不下来的雕兄 2016-12-20 16:40:41
"but" is a coordinating conjunction. it's in the same category as "and" and "yet". this type of conjunction demands PARALLELISM between the things that appear on either side of it. that doesn't happen in choice (d). the left hand side is "have improved...", which is an actual VERB. the right hand side is "introducing...", which is NOT a verb (it's just a participle). these are not parallel. FANBOYS记住
yiyi11311 2016-10-15 09:31:02
but不能加doing
yiyi11311 2016-10-15 09:31:02
but不能加doing
琴惊 2016-08-02 22:40:27
but：连词或介词
张三0925 2016-08-02 15:07:13
but后面不能加现在分词
toujiejie 2016-04-25 15:20:23
but是FANBOYS中的，需要用平行结构，所以错误
ypheroin 2015-12-27 19:08:39
but introducing 不能与have improved 平行
seline_lover 2015-10-31 13:14:06
but + 现在分词的用法错，而且but表达的是转折含义，原句并无此含义。
kefirah 2015-10-05 09:24:34
while没有but 的意思
