关于“and”连接两个句子的用法，综合权威资料整理如下：

一、基本用法：连接并列句

结构要求

- 两个分句需为完整句子，且主语、谓语等核心成分需保持一致。 - 句子间需保持逻辑上的并列关系，如时间、原因、对比等。

省略主语和谓语

- 当分句主语和谓语相同时，可省略重复部分。例如：

- The signal was given, and the steam moved slowly from the dock.

- 可简化为：

- The signal gave, and the steam moved slowly.

二、特殊用法

加强语气或动作重复

- 连接相同词语表示强调，如：

- The weather is getting colder and colder.

- He coughed and coughed.

- 表示动作反复，如：

- The company tried and tried but failed.

特殊结构

- 省略主语：

- The meeting started, and we began discussing the project. → The meeting started, and we began discussing the project.

- 连接动词不定式：

- I want to learn English, and to travel the world. → I want to learn English and travel the world.

三、注意事项

逻辑关系匹配

- 并列关系需通过语境体现，如：

- I like coffee, and my friend likes tea.

- The company expanded, and profits increased.

- 转折关系需搭配but、yet等词，如：

- The movie was boring, and I fell asleep.

- The weather was bad, yet we went hiking.

避免混淆

- 不能连接完全无关的句子，需保持主题相关性。

四、常见错误

成分残缺：

如：

The cake tastes good, and the milk is cold.

逻辑错误：如：

The company is small, and profits are high.

（应改为转折关系：The company is small, yet profits are high. ）

通过以上要点，可灵活运用“and”连接句子，提升表达的连贯性和准确性。