I will have my hair __(cut)tomorrow.这里为什么填cut?

I will have my hair __(cut)tomorrow.这里为什么填cut? I want to have my hair ___(cut) tomorrow.为什么这样填? I have to have my hair cut tomorrow对吗 1.I'll ( ) my hair ( ).答案是填have 和cut .为什么? I must get my hair cut.翻译下``这里cut为什么会是过去分词形式` I'll have my hair cut .请问：为什么cut在此是过去分词 I ____have my hair cut tomorrow I sometimes have a picnic wi my hair is too long,i will ----tomorrow!Acut it Bhave it cut I'll have my hair cut tomorrow.(同义句转换） my hair is too long.im going to have it cut.为什么这里要用cut?而不是用c have hair cut为什么不是have cut hair make my hair cut,get my hair cut 和have my hair cut都对吗?