请教牛人，OG SC 109题与181题的区别！

christinahong

109. OG 上说 require of ……employers to pay是不合语法的结构，
那require of ……employers that 是合语法的结构吗？  
答案：A

181.由非划线部分的such firms 确定前面必须有一个先行指带物firms,
题目中Because of the enormous research and development expenditures required (of firms to survive) …… , of firms 做to survive 的逻辑主语，
如果恢复require的主动语序应该是require the enormous research and development expenditures of firms to survive  ,满足require sth. to do ,
但是require n1. of n2 to do,能说的通吗？

liu9903

刘振民《语法精解》P250，require of sb to do sth.但是，OG109题，说"require of …… to do" is ungrammatic!
还有，181的主动语序是不是：because the firms require of ……to survive. to 后的动词逻辑主语应该是firms.而不同于 A require B to do, do 的逻辑主语是B。
到底怎么回事呢？

susan_luo

require 考点有3：
1、require sb. to do sth.
2、require...that...(should) do, should 省略
3、rewuire of sb...that...(should) do, should 省略

christinahong

susan_luo ，thank you!

兰蔻

就是没有require of sb to do sth.的说法？