英语句型分析（语法）The programmes also form the basis of mouthly revi

英语句型分析（语法）The programmes also form the basis of mouthly reviews,in which progress is measured against targets set in the programmes.这个句子的主谓宾状是如何分配的,大致的意思我能明白,但我总感觉这个句子有错误啊,对不上号.特别是 the basis of 怎么修饰呢?说一句很理论的我也不懂啊