I can‘t imagine her marrying a boy of that sort

这句话的语法说一下。

imagine one's doing sth :想象某人做了某事

sb of ``````:某一个人具有某种特质用of eg：it's very kind of you ``````

imagine sb doing sth 想象某人做某事

marry sb和某人结婚，固定用法

I 是主语 can't imagine是谓语，her marrying a boy of that sort是imagine的宾语，这个宾语是个现在分词形式marrying，前面her是分词的逻辑主语，在这整个宾语中marry a boy 是个动词短语，a boy是marry的宾语，of that sort是boy的定语，表示那样的男孩

i是主语，can't imagine是谓语，her是宾语，后面的作her的伴随状语

我不能想象她居然会嫁给那种男孩

我无法想象她会嫁给那样的男人的行为。

can't imagine sb's (某人的)doing sth(行为)