I have not a good friend .

问题描述:

I have not a good friend .

不对
应为 I don't have a good friend

不对
I do not have a good friend

I have not a good friend .不对
I do not have a good friend才对

不对,如果你要表达“我不是一个好的朋友”,应该是I am not a good friend
而如果你要表示“我没有一个好朋友”,则应该是 I don‘t have a good friend

不对,应该是
I have not got a good friend.
or
I don't have a good friend.