He became interested in painting at the age of 27.

他在27岁时对画画产生了兴趣

I become interested in drawing.

我开始对绘画感兴趣了。

How did you become interested in maths?

你是怎样对数学产生兴趣的？

There he become interested in black holes.

在那边，他开始对黑洞感爱好。

When did you become interested in English?

你什么时候开始对英语感兴趣的？

How did you become interested in oceanography?

你是怎样对海洋学产生兴趣的？