是I with my sister is going to go out for a picnic对还是I with my sister am going to go out for a picnic对?

是I with my sister is going to go out for a picnic对还是I with my sister am going to go out for a picnic对?
是I with my sister is going to go out for a picnic对
还是I with my sister am going to go out for a picnic对?

是I with my sister is going to go out for a picnic对还是I with my sister am going to go out for a picnic对?
I am going for a picnic with my sister
　　或者My sister and I are going for a picnic.