show interest in要不要加an

1、interest当利息用时 ,为不可数 ，不用加an。如I borrowed the money at 5% interest.我以5%的利息借钱；

2、interest当兴趣、股份用时既有可数名词又是不可数名词，这时就可以加an。He shows an interest in the machine.他对这机器发生了兴趣

例句

Some students begin to show interest in English again.

一些不喜欢英语的学生渐渐对英语学习重新产生了兴趣；

Why he\'s bound to show interest in one of them, isn\'t he?

他必定会对其中一个有兴趣的，对吗？

He liked started to show interest in me.

他开始表现出对我的兴趣。

You must not lead someone on or show interest in them for the wrong reasons.

你要是对某人感兴趣，理由一定要合理。