2.Unmarried partner(類似非法同居)
A person who is not related to the householder, who shares living quarters with, and who has a close personal relationship with the householder.
3.Dissolved partnership 大概是指兩個離異後的人所形成的壹種關系
4.A domestic partnership is a legal or personal relationship between two individuals who live together and share a common domestic life but are neither joined by a traditional marriage nor a civil union. However, in some jurisdictions, such as California, domestic partnership is in fact equivalent to marriage, or to other legally recognized same-sex or different-sex unions. The terminology for such unions is still evolving, and the exact level of rights and responsibilities conferred by a domestic partnership varies widely from place to place