The board reviewing the courses offered by the college found that the quality of academic programs were generally good b

问题描述:

The board reviewing the courses offered by the college found that the quality of academic programs were generally good but d somewhat uneven.
我知道答案是将那个were 改为was.
但board reviewing的reviewing 前面不用 加was吗?
为什么.

细分分析:
主句:The board reviewing the courses offered by the college found ...其中——
* The board found 是主句的核心部分,意思是“董事会认为...”;
* reviewing the courses ...是现在分词短语作后置定语,修饰 The board,意思是“审查...课程的(董事会)”(因为是定语,而不是句子中的进行时态谓语动词,所以不能加was);
* offered by the college 是过去分词短语作后置定语,修饰 the courses,意思是“由学院提供的(课程)”.
宾语从句:that the quality of academic programs were generally good but d somewhat uneven 其中——
主语:the quality of academic programs 中介词短语 of academic programs 修饰单数名词 quality,意思是“基础理论计划的质量”
谓语部分:were generally good but somewhat uneven 是系表结构,因为主语是单数,系动词必须改为 was,意思是“除了有些参差不齐外总体上是好的”.
整个句子的意思是:审查由学院提供课程的董事会认为,基础理论计划质量除了有些参差不齐外总体上是好的.