braveMBA

to have his marriage to Queen Catherine annulled to marry Anne Boleyn

如果将c改成to marry,那么to marry的逻辑主语是his marriage to Queen Catherine,显然不对。

A也有同样问题。so as to用于简单的系表结构，to后面的动词的逻辑主语与主句的主语一致。