want to cut my hair和want to cut my hair off有什么区别？跟want a haircut又有什么区

want to cut my hair和want to cut my hair off有什么区别？跟want a haircut又有什么区

my hair cut中的cut是名词，cut my hair中的cut是动词，意思一样“我剪头发”，用法有些区别，如:My hair cut surprised them.我剪了头发让他们吃惊。To surprise them, I cut my hair.为了让他们惊讶我剪了头发。