请问apply one's mind to 和apply oneself to 中的to是什么词性?

请问apply one's mind to 和apply oneself to 中的to是什么词性? apply oneself to sth.的意思~他是不是和apply one's mind to sth.一样捏? apply one's mind to sth.对吧,后面可不可以换成doing sth. apply oneself to sth.的意思~他是不是和apply one's mind to sth.一样捏?怎么没人回答啊……这个问题我很着急的！ change one,s mind have one‘s mind cross one 's mind get one's mind in one's mind's make up one's mind中mind make up one's mind? set on one's mind put one's mind to 请问make up one's mind 这个短语中的mind有复数形式吗?可不可以说”make up our minds change one's mind中mind可以用复数 make up one's mind mind 是可数的吗? make up one's mind mind 是可数的吗? out of mind和 lose one's mind区别?