Nearly the same, Can and Can't?

AcbeatI often missed to hear whether have someone say can or can't.Did you?

Here's how to write that.

I often fail to hear whether someone has said "can" or "can't". Do you?

(No. I'm a native speaker of English, so I can hear the difference.)

AcbeatI want you to use 'cannot' instead of saying 'can't'. What do

Thank you suggesting a correct sentence!
And if I hear English speaking very often, I would be able to distingish "can" and "can't".
Excuse me for the rude question.

Would you tell me what is rude? I want to be polite.

AcbeatWould you tell me what is rude? I want to be polite.

I want you to use 'cannot' instead of saying 'can't'.

Imagine someone in your country trying to learn your language. There is some word in you language that they have trouble understanding. They say to you, a native speaker of your language, "Don't use that word".

Does that

Alright CJ.
Thank you for teaching me!
I have little phrase to explain my thinking. So, I have to learn English more.

AcbeatAnd if I hear English speaking very often, I would be able to distingish "can" and "can't".

Yes. Those words do not sound similar in all varieties of English. Consider the differences in pronunciation here http://forvo.com/word/can%27t/#en

AcbeatSo, I have to learn English more.

OK.

CJ

Thank you for introducing me useful site.
But, British and American English are far different from each other, aren't they?

AcbeatBritish and American English are far different from each other

No. Only a little different. We all understand each other with very few problems.

CJ

AcbeatThank you for introducing me useful site.But, British and American English are far different from each other, aren't they?

In terms of pronunciation, yes.