什么叫做不接不定式的复合结构

题目

什么叫做不接不定式的复合结构
RT

答案

不定式的复合结构：for sb/sth to do sth
"介词for+名词/代词"表示不定式的逻辑主语,常用于“It is + adj.+ for sb.+ to do sth.”结构.
不定式的逻辑主语不能明确是谁时,是不用复合结构的,即：to do sth；否则,用复合结构.
不定式的句法作用举例如下：
1.主语:It is very important for you to study English.
2.表语:The car is for you to drive.
3.状语:The man works hard for his boss to be pleased.
4.定语：There is no need for you to go to the office.
5.宾语：I've arranged for her to see you off.