掌握逻辑连接词，提升英语句子的条理性和层次感
很多英语学习者在写作中总是堆砌简单句，显得幼稚、零散，表达不连贯。其实只要掌握好“并列句”的结构，你就能让自己的句子立刻有层次、有逻辑。
一、什么是并列句？
并列句是由两个或多个意义上相关但语法上独立的句子，通过并列连词连接而成的句子。
I like apples. I like bananas.
➡️ I like apples and bananas.
She is tired. She keeps working.
➡️ She is tired, but she keeps working.
二、四种常见逻辑关系
1️⃣ 并列关系（Addition）
常用连接词：and / also / as well
例句：
He studies hard, and he helps his classmates.
2️⃣ 转折关系（Contrast）
常用连接词：but / yet / however
例句：
I tried my best, but I failed the test.
3️⃣ 选择关系（Choice）
常用连接词：or / either…or… / neither…nor…
例句：
You can stay here, or you can leave now.
4️⃣ 因果关系（Cause and Effect）
常用连接词：so / therefore / thus
例句：
It was raining, so we stayed at home.
三、结构提示语：让逻辑更清晰
在正式写作中，也可以使用一些转折词开头句子，提升句式多样性：
- However, she didn’t agree with me.
- Therefore, we had to cancel the trip.
- In addition, the school organized a field trip.
这些结构常出现在写作的过渡句中，能让文章更有条理。
四、练习建议
尝试将以下句子改写为并列句：
- The sun is shining. It is very hot.
- He is not friendly. He is very smart.
- You can choose this book. You can read that one.
建议：写完之后检查逻辑关系（是转折？是因果？）再选用合适连接词。
掌握并列句，不只是“句子变长”，更是“表达变清晰”。在“李校来啦英语训练系统”中，你可以每日进行句型转换练习，积累多种连接方式，系统提升句式表达力和写作条理性。
