i want to learn english. i can help you with your spanish. i am from madrid. my skipe is joseangel0369. my email is [email protected]

i'll explain it little more -like if i say 's' it comes 'sh' and because of this i am having a lot problems

Here is a helpful video that helps with the /s/ sound. It uses British English, so some of the words that they use will not be pronounced the same as in English, but in general, it is helpful. http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/sounds/con_voiceless_7.shtml For American English pronunciation here is a good website: http://www.englishteachermelanie.com/ The best way to fix pronunciation is to listen to native speakers and attempt to pick up their accent.

Could you please explain a little more in detail what the problem is? Thank you.

The only way to learn is through experience I afraid. Just keep practicing and you'll learn to identify whether or not the 's' is pronounced in the word.