this music is good to dance to中的动词不定式作什么成分

问题描述:

this music is good to dance to中的动词不定式作什么成分

this music is good to dance to这个句子的变体是It is good to dance to this music (这个适合做舞曲).从此句中,不难发现,不定式实际是充当主语的,it只是形式主语.
又如It is interesting to talk with him =He is interesting to talk with .(和他交谈,挺有趣的)