| 单词 | 词性 | 中文含义 | 例句 |
| Idea | 名词 | 想法，主意 | I have a great idea for the project. |
| Important | 形容词 | 重要的 | It is important to study regularly. |
| Interesting | 形容词 | 有趣的 | This book is very interesting. |
| In | 介词 | 在……里面 | She is in the room. |
| Inside | 副词/介词 | 在……内部 | The keys are inside the drawer. |
| Internet | 名词 | 互联网 | I use the internet to find information. |
| Interview | 名词/动词 | 面试，采访 | He had an interview with the company. |
| Island | 名词 | 岛屿 | We visited a small island last summer. |
| Iron | 名词/动词 | 铁，熨斗；熨烫 | She ironed her shirt before the meeting. |
| Ice | 名词 | 冰 | There is ice on the road. |
| Information | 名词 | 信息 | I need more information about the event. |
| Increase | 动词/名词 | 增加，增长 | The price has increased by 10%. |
| Influence | 名词/动词 | 影响 | His words had a big influence on me. |
| Imagine | 动词 | 想象 | Can you imagine living on Mars? |
| Include | 动词 | 包括 | The package includes a free gift. |
| Inspire | 动词 | 激励，鼓舞 | Her story inspired many people. |
| Intelligent | 形容词 | 聪明的 | He is an intelligent student. |
| Interest | 名词/动词 | 兴趣，利息 | The movie caught my interest. |
| Interior | 名词/形容词 | 内部的，内饰 | The interior of the car is very comfortable. |
| Introduce | 动词 | 介绍 | Let me introduce you to my friend. |