题目

英语句子成分分析 this increasingly high level of education is probably a necessary.
英语句子成分分析 this increasingly high level of education is probably a necessary,but not a sufficient,condition for the complex political system required by advanced economic performance
condition for the complex.是独立主格?它和前面的句子是什么关系?

提问时间：2020-12-12

答案

首先,condition for the complex.不是独立主格.其实,是中间的插入语“but not a sufficient,”让人很容易对句子的成分感到迷惑.嗯,我们先去掉插入语,就可以看到句子变成了：this increasingly high level of education is probably a necessary condition for the complex political system required by advanced economic performance.
这样一来,句子结构就明显了.主语：this increasingly high level of education（即level）
谓语：is 表语：a condition 还有其他一大堆修饰成分,嗯,就是这样了.
而插入语“but not a sufficient,”就是起到补充说明的作用,necessary,but not a sufficient就是：必要但是不充分
a necessary,but not a sufficient,condition就是：一个必要不充分条件 了.
希望能帮上你~