it hoped they would learn how shop-floor lighting affected workers' productivity.的语法
问题描述：
it hoped they would learn how shop-floor lighting affected workers' productivity.的语法
能帮我分析一下这个句子的语法吗?
答
有三层
It is hoped--they would learn--how shop-floor lighting affected
1.形势主语It 2.从句 3.从句的从句 affected 是谓语
worker's productivity.
后面的是宾语