1.be interested in （doing）sth　 对某种想法感兴趣，doing 通常为想法。

I'm interested in working in Switzerland. Do you have any idea about that? 我对在瑞士工作感兴趣。你想过这事吗?　

Anyone interested in joining the club should contact us at the address below.

有意加入俱乐部者请按下面的地址和我们联系。《牛津高阶英汉双解词典》

I think the young man is getting interested in gardening.

我认为这个年轻人开始对园艺产生兴趣了。《柯林斯高阶英汉双解学习词典》

She was never interested in fitness before but now she's been bitten by the bug.

她以前从来不在乎健身，现在她却着了迷。

I'm not interested in a romantic relationship.

我对谈情说爱不感兴趣。

She's interested in him for purely mercenary reasons.

她对他感兴趣完全是为了贪图金钱。

They were more interested in courtship and cars than in school.

比起上学，他们对谈恋爱和汽车更感兴趣。

Car buyers are more interested in safety and reliability than speed.

购车者们更感兴趣的是汽车的安全性和可靠性，而不是它的速度。

The British brand of socialism was more interested in reform than revolution.

英国式的社会主义更加注重改革，而不是革命。

Neither Anna nor I are interested in high finance.

安娜和我对巨额融资都不感兴趣。

Mark was mainly interested in sport at school, playing rugby as well as soccer.

在学校，马克主要对体育运动很感兴趣，他打橄榄球，也踢足球。Since when have you been interested in poetry?

你从什么时候开始对诗歌感兴趣的？

Employers are interested in how you approach problems.

雇主们对你如何处理问题感兴趣。

Voters are interested in the representative's ability to bring home the bacon.

选民感兴趣的是代表能否兑现承诺。

2.be interested to do　　 有兴趣做某事，想了解某事,有意做某事，很想做某事，很乐意做某事。

We would be interested to hear your views on this subject.

我们很想听听你对这个话题的看法。

I'd be interested to meet her.

我有意见见她。

I shall be interested to know what happens.我很想知道发生了什么事。

3.show/have/ take an interest in (doing) sth有兴趣做某事，想了解某事,有意做某事，很想做某事，很乐意做某事。

He showed a lively interest in politics.

他对政治表现出浓厚的兴趣。

The papers also show a lively interest in European developments.

论文对欧洲的动向亦表现出浓厚的兴趣。

She showed no interest in her children.

她对自己的孩子毫无兴趣。

There is a fine line between showing interest in what someone is doing and interfering in it.

关心别人正在做的事情和进行干预之间存在着细微的差别。

Unlike his more famous namesake, this Bill Clinton has little interest in politics.

这位比尔∙克林顿和那位著名的同名人不同，对政治没什么兴趣。

They have a vested interest in keeping the club as exclusive as possible.

他们希望俱乐部尽可能地限制会员加入以从中受益。

The government has said it wants to create a stakeholder economy in which all members of society feel that they have an interest in its success.

政府表示希望建立一种人人参与的经济模式，让社会全体成员觉得其繁荣将给每个人带来利益。

Organizations have an interest in ensuring that employee motivation is high.

各机构皆知获利之道在于确保员工士气高昂。

《牛津高阶英汉双解词典》

She took no interest in the people and things around her.

她对周围的人和事毫无兴趣。

Oh I'm not political, I take no interest in politics.

噢，我不关心政治，对政治一点也不感兴趣。

I had no real interest in politics.

我对政治的兴趣不大。

She seemed to have lost interest in food.

她好像对食物不感兴趣了。

Do your parents take an interest in your friends?

你的父母有兴趣了解你的朋友吗？

He had an unhealthy interest in disease and death.

他对疾病与死亡有一种病态的兴趣。

My parents always took an interest in my hobbies.

我父母总是关心重视我的爱好。