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Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil, their descendants, popularly known as killer bees, had migrated as far north as southern Texas.
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分析B选项
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原句句子结构：(Less than 35 years…,) their descendants…had migrated…
原句表达逻辑语义：在巴西的圣保罗外释放了非洲蜜蜂的不到35年里，他们（蜜蜂）的后代，俗称食人蜂，已经迁徙到北至德克萨斯南部。
A. 正确
B. their descendants做句首短语releasing的逻辑主语，句义不合理。
C. since与had done动词形式错误。
D. it无所指：it做形式主语时指代不定式或者that从句；when their descendants had migrated as far north as southern Texas导致句子逻辑变化。
E. 连词and改变原句合理语义；and前后平行主语有歧义。
499685skw
in这个介词将35年的时间变成了时间段，而原句表示的时间是还在继续的。所以不能加in这个介词。
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2022-10-02 17:16:27
567134txlx
我觉得这道题的重点是in 和 after的用法： in +时间段：与将来时连用 ： He will be back in two hours. after +时间段：与过去时：He came back after two hours. 连用 after +时间点：可与将来时连用 He will be back after two o'clock. in+一段时间表示将来时...
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2022-08-23 16:26:51
680461elv
their descendants 不是和releasing动作的发出者，用ing错误。
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2022-08-15 09:56:29
小良冠二郎
c 用了had been 两个had been 语态错乱 d when这里代表的意思是同时发生，不对，且如果it做形式主语，（后面跟todo 或that）那么那that去哪里了 e 核心句子意思就没有对，honeybees被释放然后后代怎么样怎么样一共花了不到35年 （核心句意：在bees被释放不到35年，后代完成迁移） e的时态也是错乱的
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2022-06-07 18:17:01
小良冠二郎
为什么是过去完成时？
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2022-06-07 18:14:51
微微962464
时间段没有被修饰： in three days(三天后), I will do X in less than two years(在不到两年的时间里), I will do X for more than six years(六年多来), I did X 时间段被修饰： three days after the wedding, I did X. -介词mod more than six years before the French Revolution,he did X.-介词mod Less then five minutes after you called, i did X. -clause mod two days before you returned to town, i did X - clause mod
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2022-04-01 15:44:40
207965wdvn
since African honeybees had been released outside 接后面 their descendants, had migrated as far north as southern Texas. 暗示两个事情同时发生，显然不可能；先 released 再 migrated
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2021-08-31 14:18:08
217285de
时间长度前面一般不加in
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2021-05-15 11:10:33
329301rxnp
1. 时间长度+since时，时间长度前面一般不加in 2. since的主句一般用现在完成时，当在比较两个动作的先后时也可用过去完成时，但这里migrate是两个动作中偏后面发生的动作，所以不构成过去完成时。
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2021-04-08 03:07:03
329301rxnp回复 329301rxnp
在网上看到了一个更好地解释，补充一下：我们把时间长度分为两种
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2021-05-15 23:59:40
567464a
为什么不可以呀？未划线部分肯定是正确的，而未划线部分用了their，说明指代的肯定是复数的，而前面部分只有honeybees是复数，所以肯定指代的的是honeybees
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2021-01-26 22:27:35
567464a
这个网页的回答真的讲的很好，很清楚，而且能让你接受。其实我觉得大家的评论都有点牵强，还是很建议大家花一点时间来看一下这个网页的内容（虽然有点长）。这个网页通过这道题详细的讲了过去完成时的用法还有一些其他的内容，很值得一看
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2021-01-26 22:25:14
570239pybw回复567464a
哪个网页
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2021-02-07 18:50:41
啊哈不是啊哈哈回复567464a
笑死 哪个网页啊
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2021-04-18 19:35:52
437168tb
(A) 正确, after + n.结构避免了逻辑主语问题; less than 35 years after …符合习惯用法
(B) since releasing放在句首,逻辑主语等于句子的主语their descendants, 不符合逻辑; since是现
在完成时的标志和had migrated矛盾; since的使用不符合习惯用法
(C) since是现在完成时的标志和had migrated矛盾; since的使用不符合习惯用法
(D) it不能指代介词短语from the release…
(E) it不能指代介词短语from the release…
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2020-10-14 16:19:03
315843q
DE无指代 BC since用在完成时
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2020-09-09 16:45:51
441420ztyf
B不是时态的问题，since releasing作为verb-ing修饰，需要修饰后边的主语，但是后边的主语是killer bees，不符合逻辑
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2020-08-03 02:31:47
187569hqa回复441420ztyf
i think so
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2020-09-20 18:58:59
菜菜是小可爱
B 的in放在时间前 是有一个将来时的意思 和since 是不能放在一起的， since 只做现在完成时 的修饰
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2020-06-13 14:18:24
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句子改错SC
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