Difference between 的 and 个 Does it make sense to say 我个心? I suppose its meant to be 我的心. I still cannot distinguish when to use it. Maybe it to do with the fact that I am a Cantonese speaker?
我个心 does not make sense. I guess you're confusing 个 with 嘅.

我嘅广东话讲得好唔好 => 我的广东话说得好不好

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个(quantifier) pattern：number + 个 + noun

examples：一个人，六个核桃

when used without a number it normally just mean one：

我有个朋友 => 我有一个朋友

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的(particle) pattern：noun/pronoun + 的 + noun

examples: 我的心，我喜欢的人，聪明的孩子