What is the difference of the words? How do you pronounce "can' and "can't"?

1. I can do it.
2. I can't do it.

(How do we distinguish the difference? Would you like to explain it?)

2 answers

You can distinguish the difference between them, by changing can't to cannot, which is more formal way of writing it in literature. Can't is pronounced as Kant.
Can't is a contraction of the two words CAN NOT; therefore:
"I can't do it" is the same as saying
"I can not do it."