1.Civil partner(same-sex marriage同性婚姻)：Civil partnerships in the United Kingdom, granted under the Civil Partnership Act 2004, give same-sex couples rights and responsibilities identical to civil marriage. Civil Partners are entitled to the same property rights as married opposite-sex couples, the same exemption as married couples on inheritance tax, social security and pension benefits, and also the ability to get parental responsibility for a partner's children,[1] as well as responsibility for reasonable maintenance of one's partner and their children, tenancy rights, full life insurance recognition, next-of-kin rights in hospitals, and others. There is a formal process for dissolving partnerships akin to divorce.
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一種關係
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
