If we have to walk in the street ,I should walk on the outside.请问这句话是不是使用虚拟语气,有无错前半句的语态使用是否正确?

If we have to walk in the street ,I should walk on the outside.请问这句话是不是使用虚拟语气,有无错
前半句的语态使用是否正确?

没有使用虚拟语气,但有一点极小的错误--标点符号.Street和逗号之间不应有空格.相反,逗号和I之间则要空格.
如用虚拟语气表达,可改写成：If we had to walk in the street,I would walk on the outside.

不是

不是，没什么错

如用虚拟语气表达，可改写成：If we had to walk in the street, I would walk outside it.