作为不定式时,to 后面要跟动词原形,如 I want to read the book.
to 也可以作介词,后面要跟名词/动名词,如 I look forward to seeing you.
That was the closest anyone come to calling me fat.这里的 to 就是介词,后面的 calling 是动名词.全句意思是：那是别人最接近于说我胖的一次了.