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题库 / Prep2007E1-SC-21
When Nigeria achieved full independence in 1960, they had already established a federal political structure consisting of three regions based on the three major population clusters that were in its borders.
they had already established a federal political structure consisting of three regions based on the three major population clusters that were in
they already had established a federal political structure consisting of three regions that was based on the three major population clusters inside
they already had established a federal political structure that consisted of three regions based on the three major population clusters in
it had already established a federal political structure that consisted of three regions based on the three major population clusters within
it already had established a federal political structure consisting of three regions being based on the three major population clusters it had within
E it had 和 its重复
国家是单数，国民是复数
E，凡是being done作定语或状语，意指被动动作的都是错误的，直接用过去分词
请问E选项，being based on 结构是表示什么意思？该怎么判断呢？
这是分词短语呀～选项D中的based on是过去分词短语；选项E中的being based on是现在分词短语。这里都是作定语的，属于简化定语从句嘛～
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主谓一致，杀ABC
E、非常redundancy，加了it had，改变句意
这道题的E选项里面：
1）already的位置有没有错误？
2）being based有没有错误: 我看到讨论里面好多being done的解释，这个语法点一般是怎么考的？
3）后面it had加在这里可以么？
being done 表示同时性
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Nigeria 尼日利亚，单数谓语。正确D。 未划线部分its， ABC无指代对象，
Nigeria 尼日利亚
未划线部分its， ABC无指代对象
E, it had,: it had three major population clusters; based on three major population cluster
not logic.
E，being based强调与主句动作的同时性，having done/to have done则强调先时性；
clusters it had within its borders，已经说了是在它的边境的，不用再说是它拥有的。
E，凡是being done作定语或状语，意指被动动作的都是错误的，直接用过去分词
(E) based on the three major population clusters it had within....定语从句，还原以后Nigeria had three major population clusters
未画线部分的its，导致ABC的they都没有指代的对象。
当题干给出专有名词时一般有未划线处的线索可以判断其单复数。 题中its borders说明N是单数，排除ABC
DE对比：E中it had和its表意重复，其次"being based on"中being多余
而且后面是its呀！问问自己= =
Nigeria n. 尼日利亚（位于非洲）
Nigeria n. 尼日利亚（位于非洲）
ABC they和不划线不和its指代的是同一个名词 则错误