I must get my hair cut.翻译下``这里cut为什么会是过去分词形式`

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 must get my hair——（cut）用适当形式填空 I must get my hair——(cut)用适当形式填空 I will have my hair __(cut)tomorrow.这里为什么填cut? get your hair cut!翻译 翻译:I'm on my way back home to get my hair cut. make my hair cut,get my hair cut 和have my hair cut都对吗? 1.I'll ( ) my hair ( ).答案是填have 和cut .为什么? I have my hair cut yesterday.这句话对吗?为什么是have而不是 had? cut的过去分词 I had my hair cut yesterday对不对