①bored  无聊的，厌倦的（主语通常是人）
②boring 令人厌烦的；无趣的，无聊的（主语通常是物）

例句：
There was a bored expression on her face. 
她脸上有一种厌倦的表情。

She finds it boring at home. 
她觉得待在家里很无聊。

★根据具体情况，无聊用英语可以这样表达：

1. Bored

- I'm so bored right now. Let's do something fun. (我现在很无聊，让我们做点有趣的事情吧。)

- The lecture was so boring, I almost fell asleep. (这个讲座太无聊了，我差点睡着了。)

2. Uninteresting

- This book is uninteresting, I can't get into it. (这本书不有趣，我没法沉浸其中。)

- The movie was uninteresting and predictable. (这部电影很无聊，情节也很可预测。)

3. Tedious

- Doing the same thing every day can be tedious. (每天做同样的事情会很无聊。)

- It's a tedious process, but we have to go through it. (这是一个繁琐的过程，但我们必须经历它。)

4. Dull

- The party was really dull, nobody was talking. (这个派对很无聊，没人在聊天。)

- The museum exhibit was quite dull, I expected more. (这个博物馆展览很无聊，我原以为会更有趣。)

5. Monotonous

- His job is monotonous, he does the same thing every day. (他的工作很单调，每天做同样的事情。)

- The speech was monotonous and lacked enthusiasm. (这个演讲很乏味，缺乏激情。)

6. Lackluster

- The performance was lackluster, the actors didn't seem very invested. (这个表演很平淡无奇，演员们似乎没有很投入。)

- The presentation was lackluster and didn't catch my attention. (这个演示很平淡无奇，没吸引我的注意力。)

7. Tiresome

- Listening to his complaints is tiresome. (听他抱怨很让人疲惫。)

- The meeting was so tiresome, it lasted for hours. (这个会议很无聊，持续了几个小时。)

好了，以上就是无聊用英语怎么说的具体内容，你学会了吗？