1
cohabitation with sb
with 引出同居的对象；cohabitation 通常作不可数名词，前面可用 her 等限定词。
Her cohabitation with her partner was brief.
她与伴侣的同居很短暂。
同居
cohabitations — plural of cohabitation
先理解核心含义，再看它在真实句子里的用法。
同居
the act of living together and having a sexual relationship, especially without being married
Her cohabitation with her partner was brief.
她与伴侣的同居很短暂。
未经法律或宗教认可的同居关系,包含共同居住地及情感和身体上的亲密关系。
An emotional and physical intimate relationship which includes a common living place and which exists without legal or religious sanction.
共同居住的行为。
The act of living together.
两个或更多人共同居住的地方。
A place where two or more individuals reside together.
两个物种在同一栖息地共同生活的行为。
The act of two species living together in the same habitat.
Many young couples in the city choose cohabitation before getting married.
城市里许多年轻情侣在结婚前选择同居。
Their cohabitation lasted only six months because they could not agree on daily expenses.
他们的同居只持续了六个月，因为他们无法就日常开销达成一致。
Some people see cohabitation as a way to test whether two partners are compatible.
一些人把同居看作测试伴侣是否合得来的方式。
with 引出同居的对象；cohabitation 通常作不可数名词，前面可用 her 等限定词。
Her cohabitation with her partner was brief.
她与伴侣的同居很短暂。
between 强调两个主体之间的同居关系，A 和 B 通常为平行的名词性成分。
Cohabitation between unmarried partners is increasingly common.
未婚伴侣之间的同居越来越普遍。
a period of 表示一段持续的时间，常用于描述同居的时长。
After a period of cohabitation, they decided to get married.
经过一段时间的同居，他们决定结婚。
Not this
They cohabitation lasted only six months.
Use this
Their cohabitation lasted only six months.
cohabitation 是名词，前面需要形容词性物主代词 their 来修饰；they 是主格代词，不能直接放在名词前。改为 Their cohabitation 后，主语表示“他们的同居”，语法正确。
Not this
His cohabitation to Mary was shorter than expected.
Use this
His cohabitation with Mary was shorter than expected.
表达“与某人同居”时，cohabitation 后接介词 with 引出对象，不用 to；to 容易受 marry to 等搭配的干扰。cohabitation with Mary 意为“与玛丽的同居”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
同居协议
They signed a cohabitation agreement before moving in together.
他们在搬到一起住之前签署了一份同居协议。
同居关系
The couple's cohabitation relationship lasted for five years.
这对伴侣的同居关系持续了五年。
婚前同居
Many young people now view cohabitation before marriage as a normal step.
许多年轻人现在把婚前同居视为正常的一步。
同居率
The cohabitation rate has risen sharply over the past decade.
过去十年间同居率大幅上升。
同居法律
The new cohabitation law grants certain rights to unmarried partners.
新的同居法律赋予了未婚伴侣一定的权利。
Use cohabitations naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把co-想成“共同”，habitation想成“住所”：共同住进同一个住所，就是cohabitation（同居）。
语域：formal 常见场景：法律文书、社会学讨论、人口统计 cohabitation 通常属于较正式用语，多用于法律、社会学或官方统计等书面场合；日常口语中更常说 living together。
以上单词的重读元音均为 /eɪ/，且后面都接 /ʃən/，所以与 cohabitation /ˌkəʊhæbɪˈteɪʃən/ 押韵。其中 habitation、invitation、imitation、sanitation、meditation 还以 '-itation' 结尾，拼写与目标词相似。注意：cohabit（/kəʊˈhæbɪt/）是形近词，但发音不同，不押韵。
Dictionary facts from ECDICT, WIKTIONARY.