I have got a headache,backache and a runny nosebackache背痛的前面为什么没有冠词而headache 和 a runny nose前面有冠词

I have a headach ..What should i do I'm tired and have a lot of headaches为什么headach加es I have got a I have got a bad I have got a hobby cause i have got a I have got a thing for /// I have got a thing for I have got a cold什么时态 I have got a bad cold today. I have got a green bike I have got called friend a I have got a sisrer同义句 Have you got your exam r______?Yes,I got it yesterday,I got an A. What have you got? A.I have got an apple B.I have got orange选哪个为什么? I had a cold.I have got a cough Have you got a small family?I've got a small family.got 在哪里用 i have got a pen中的have是不是助动词