1
be roommates with sb
表示“与某人是室友”时，常用复数 roommates，主语可以是一人或多人。
She is roommates with a medical student.
她和一名医科学生是室友。
室友
roommates — plural of roommate
先理解核心含义，再看它在真实句子里的用法。
室友
a person who shares a room with you
She is roommates with a medical student.
她和一名医科学生是室友。
与自己合住一室的人,如在宿舍、兵营、寄宿公寓或公寓中。
A person with whom one shares a room, as in a dormitory, barracks, rooming house, or apartment.
与你共用房间的伙伴
an associate who shares a room with you
My roommate and I take turns cleaning the kitchen every week.
我和我的室友每周轮流打扫厨房。
She is looking for a new roommate because her current one is moving out.
她正在找一位新室友，因为她现在的室友要搬走了。
When I lived in the dorm, my roommate always woke up before me.
我住在宿舍时，我的室友总比我起得早。
表示“与某人是室友”时，常用复数 roommates，主语可以是一人或多人。
She is roommates with a medical student.
她和一名医科学生是室友。
可用定语从句补充室友的具体情况，如职业或作息时间。
He has a roommate who works nights.
他有一个上夜班的室友。
表示“我的某个室友”时，用 a roommate of mine 比 my roommate 更自然，尤其当你有多位室友时。
A roommate of mine recommended this restaurant.
我的一个室友推荐了这家餐厅。
Not this
I have two roommate.
Use this
I have two roommates.
roommate 是可数名词，表示两个或两个以上时要用复数形式 roommates；中文名词没有复数变化，所以学习者容易在数词后漏掉 -s。
Not this
I have no any roommates.
Use this
I have no roommates.
no 本身就是否定词，后面直接跟名词，不能再与 any 连用；受中文“没有”直译的影响，容易把 no any 一起写出。删去 any 后语法正确。
Not this
My roommate and I are in a same class.
Use this
My roommate and I are in the same class.
表示“同一个”时，same 前要用定冠词 the，构成 the same；不定冠词 a 不能与 same 搭配，因为 same 指双方已知、唯一的一个。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
大学室友
My college roommate and I are still good friends.
我的大学室友和我仍然是好朋友。
找室友
He put up an advertisement to find a roommate.
他贴了广告找室友。
室友协议
The housing office asks new students to sign a roommate agreement.
宿舍管理处要求新生签署室友协议。
噩梦室友
I once had a roommate from hell who never cleaned.
我曾经有个从不打扫的噩梦室友。
更换室友
You can ask the dorm manager if you want to change roommates.
如果你想更换室友，可以找宿舍管理员。
与室友相处融洽
She gets along well with her roommates.
她和室友们相处得很好。
发长 /uː/ 音 (如 food, boot)
Use roommates naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想记忆：room（房间）+ mate（伙伴）= 同住一个房间的伙伴，即室友。
语域：neutral 常见场景：大学宿舍、合租住房、日常交谈 roommate 是日常通用词，通常指同住一间房或同租一套房的人，口语和一般书面语都可以使用，不区分正式程度。
These all rhyme with the final -mate syllable of roommate (/meɪt/): classmate, teammate, soulmate, playmate, shipmate, and cellmate. Be careful with spelling lookalikes that sound different: intimate (adj. /ˈɪntɪmət/), estimate (n. /ˈestɪmət/; v. /ˈestɪmeɪt/), ultimate /ˈʌltɪmət/, and climate /ˈklaɪmɪt/ do not rhyme with roommate.
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.
Watch the sound change