you have a long face.为什么要在中间加a

you have a long face.为什么要在中间加a you have a long face 变一般疑问句 是不是Do you have a long face? My face is round.I have a round face.Your face is long.you h Have you a big face How long have you been 为什么加suffering from a headache不用suffer did you have breakfast,中间的为什么要加have i have a round face 改成一般疑问句 和your have a long face Dose your sister have a long face?（做肯定回答) You have a round face.意思 How long have you lived here?中的How long后面为什么要加have I have a big face. I have a long arm and a short arm. I have we have been best friends for a long time中friends为什么要加s