but... not like we(japanese) always distinguish harth from hurth easily

hurt vs heart or heard vs hard is one of the common things we used to get questioned on english tests at school, meaning, lots of us cant tell the difference.
Potjeh wrote:I knew the right pronounciation, but my th always turns out as t because th is not a sound in my language
reminded me of a movie scene, where a boy was trying to pronounce th and always ended up with t. its a slavic thing, correct?
[th] isnt that hard for us, but seems we get to hear it as [s] instead and say nossing for nothing.
https://www.youtube.com/watch?v=whU1I7b4ORc