Don't say you have lost everything, because you and I 这句话最后用you and i对吗,为什么?

Don't say you have lost everything, because you and I 这句话最后用you and i对吗,为什么?
Don't say you have lost everything, because you and I 这句话最后用you and i对吗,为什么?

Don't say you have lost everything, because you and I 这句话最后用you and i对吗,为什么?
you and i 是主语啊,在because后面加的话句子不完整的