你问的时成分么?它有很多用法,除了谓语,它什么成分都能做
作宾语 I like to keep everything tidy. 我喜欢每件东西都保持整洁.
作补语 We believe him to be guilty. 我们相信他是有罪的.
做主语 To see is to believe. 百闻不如一见/眼见为实.
It's easy (for me) to do that.我做这事太容易了
作表语 My chief purpose is to point out the difficulties ofthe matter.我的主要目的是指出这件事的难点
作状语 I come here only to say good-bye to you. 我来仅仅是向你告别.
作定语 He has a lot of meeting to attend .他有很多会议要参加.