Have I a pen,I will write down it.这句能这么写吗?是倒装句吗?

题目

Have I a pen,I will write down it.这句能这么写吗?是倒装句吗?
我是学这个句子的语法结构.Were I you,I would try it again.这句倒装句WERE提前好像可以省略IF.那这句省略了IF,那原文是If I was you还是If I were you?我觉得应该是was,但为什么用Were提前做倒装不用was?

答案

英文里虚构固定用法,Were I,Were he,Were she,都要用were
所以应该用Had I a pen,I would write it down.