connect 有三个核心用法：① 「物理连接」：connect A to B（将A连接到B：connect the printer to the computer = 将打印机连接到计算机）；② 「建立联系（人与人）」：connect with sb.（与某人建立连接/产生共鸣：the speech really connected with the audience = 演讲真正引起了观众共鸣）；③ 「联系，有关联」：be connected to/with sth.（与…有关：be connected to organised crime = 与有组织犯罪有关）。名词：connection（联系；关联；关系；交通联运：make a connection = 建立联系；the connection between A and B = A与B的关联；miss a connection = 错过换乘）。
释义
1
v.连接（将物理上分开的事物联结）
The new high-speed rail line will connect the two cities in under forty minutes, dramatically reducing travel time for commuters.
新的高铁线路将在不到四十分钟内连接两座城市，大幅缩短通勤者的出行时间。
2
v.联系，建立关联（将想法、事件或人联结）
Investigators have connected the suspect to a series of similar crimes committed in neighbouring counties over the past two years.
调查人员将该嫌疑人与过去两年在邻近县发生的一系列类似犯罪联系起来。
语感
connect A to B（将A连接到B）；be connected to/with（与…有关联）；connect with sb.（与某人产生共鸣/连接）；connection between A and B（A与B的联系）；make a connection（建立联系）
连接（物理：connect A to B）联系，建立关联（be connected to/with）与某人产生共鸣（connect with）
高频搭配：connect A to / with B（将A与B连接：connect the device to the network = 将设备连接到网络；connect one idea with another = 将一个想法与另一个联系起来）；be connected to / with sth.（与…有关：be connected to the scandal = 与丑闻有关联）；connect with sb.（与某人建立情感连接或共鸣：connect with the audience = 与观众产生共鸣）；connection between A and B（A与B之间的联系：the connection between poverty and crime = 贫困与犯罪的关联）；make / establish a connection（建立联系）；in connection with（与…有关，书面：arrested in connection with = 因涉嫌…被捕）；well-connected（人脉广的：a well-connected businessman = 人脉广的商人）；辨析：connect（连接，建立联系，较中性）vs. link（链接/联系：link A to B = 将A与B联系，常用于因果或关联：link smoking to cancer = 将吸烟与癌症联系）vs. associate（联想，联系：associate X with Y = 将X与Y联系起来）。
陷阱
⚠️connect to vs. connect with——介词语义差异
The new bridge connects the island to the mainland, making it accessible for the first time by road.
✗
connect to = connect with（完全可互换）
✓
connect A to B（物理连接，使之成为一体：connect the island to the mainland = 将岛屿与大陆连接；connect A to a network = 连接到网络）；connect with sb.（建立人际/情感连接，产生共鸣：connect with the audience = 与观众产生共鸣；the message connected with voters = 信息引起了选民共鸣）；两者均可用于「关联」但侧重不同：be connected to（与…有关联，较中性）vs. connect with（更强调情感或共鸣层面）
新桥将岛屿与大陆连接起来，使其首次可通过公路到达。（connects A to B = 物理连接，正确）
⚠️in connection with（与…相关）——书面固定搭配
✗
Three individuals have been arrested in connection to the investigation into the alleged financial fraud.
三人因涉嫌金融欺诈调查被捕。（× in connection to → ✓ in connection with，书面固定搭配）
in connection with（与…相关，固定搭配）是正式书面英语；× in connection to = 非标准（常见错误）；标准：arrested in connection with the investigation = 因调查而被捕；in connection with = 与…有关；× in connection to 虽在口语中偶见，但书面英语应用 with
✓
Three individuals have been arrested in connection with the investigation into the alleged financial fraud.
三人因涉嫌金融欺诈调查相关被捕。（in connection with，× in connection to）
近义辨析
connectvslink
connectconnect（连接，联系：connect A to B = 将A连接到B；物理连接或建立关联；中性）linklink（联系，连接：link A to B = 将A与B联系；比 connect 更常用于「因果或证据上的关联」：link smoking to cancer = 将吸烟与癌症联系；studies link X to Y = 研究将X与Y联系起来）
The tunnel connects the two platforms, allowing passengers to transfer between lines without going through the ticket barriers.
隧道将两个站台连接起来，让乘客可以在不经过检票口的情况下在线路间换乘。
A number of studies have linked excessive screen time in early childhood to difficulties with attention and language development.
多项研究将幼儿期过度使用屏幕与注意力和语言发展困难联系起来。
写作加分
✨ 加分词
替换：joinrelate tohave to do with
社会问题议论文政策分析话题科技话题
普通
Poverty and poor health have a lot to do with each other.
贫困与健康不良有很大关系。
加分 ✨
Research consistently connects socioeconomic deprivation to worse health outcomes, underscoring the need for policies that address both poverty and healthcare access simultaneously.
研究持续将社会经济剥夺与更差的健康结果联系起来，强调了同时解决贫困和医疗保健获取的政策的必要性。
为什么更好：connects A to B 比 have to do with 更书面精确；underscoring the need for 引入政策启示；simultaneously 指出双轨并行的必要性