英语中有种结构叫介宾结构,宾语应该时名词性的,所以要用符合名词性的成分,如果时动词,可以通过+ing 实现为动名词,动名词就是具有动词的意思,但名词的语法。如: I am interested in going with him. I am looking forward to seeing you 等。