I DON'T HAVE MUCH TO DO.这个TO在这里是什么意思?是动词不定式吗?

I don’t know what to do 这是动词不定式做什么成分? I don`t have much time to do anything else.'' 4.I don't know where to meet (meet) him .这里为什么填动词不定式?这句话是宾语从 want to的否定是don't want to,而decide +not to do?不都是动词不定式吗? I don't have enough time to spend with her.中的动词不定式做什么成分 --i feel tired .i have so much work to do and don't have muc i feel tired ,i have so mucu work to do and don't have much have sb (to)do sth,这里动词不定式省略了TO i want to be more independent,这里面to be 是动词不定式,这个知道,那i want m We have to start early,don’t we?请问这里的have是实义动词吗 .My problem is that I don't have much time to do the I have much housework to do.及使役动词let have make 后常跟不带to的不定式作宾