Recent research indicates that two popular arthritis drugs may not be as safe as they were initially believed to be.
语法 Sentence Correction-3497
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sonic 2014-09-26 11:56:49
﹝as...as﹞又是一次，但這次可以更明確的看到問題的爭點。可以發現，AB兩個選線的as...as比較都可以通，但是一個主動，一個被動；常理而言比較傾向主動，但是往後看，卻發現後續的段落，明顯是B較A優。原因除了句意之外，更重要的在於「句子的對稱」。
Lottieeee 2016-10-10 21:28:40
if you say "they initially believed" (active voice - also "they believe/believed/etc"), then * you DON'T use "to be" * "they" stands for the people who hold some belief. ex: the materials testers found that Metal X was much better at conducting than they had believed. --> in this case, "they" = the materials testers. this sentence is fine, although it would probably be stronger if "...to be the case" were appended after "believed". if you say "they were initially believed to be" (passive voice - also "they are believed to be / were believed to be / etc), then * you DO use "to be" * "they" stands for the people/objects to whom/which the beliefs pertain, NOT to the people who hold the beliefs. ex: Metals X and Y is much better at conducting electricity than they were believed to be. --> in this case, "they" = Metals X and Y. this sentence is also fine (although it's not the most beautiful thing in the world).
katieeeeee 2014-12-13 02:43:40
they指代药的话主动时态错误
vickiaro 2015-11-06 11:10:43
同时，前面是drugs may not be，后面是were believed to be，相比之下，更完整。
SharonUSA 2015-09-20 16:12:28
错Athat two popular arthritis drugs are possibly not as safe as they initially believed 错在：believed后面的to be不能省 Ron:"if you say "they initially believed" (active voice - also "they believe/believed/etc"), then * you DON'T use "to be" * "they" stands for the people who hold some belief. if you say "they were initially believed to be" (passive voice - also "they are believed to be / were believed to be / etc), then * you DO use "to be""
isammi7 2015-07-30 16:16:02
A里面的they无指代，如果指代drugs应该用被动形式
