Want to speak like a native? Say FACEsssssssBOOK SsssssssLOWLY like a SsssssssNAKE....
Learners of English tend to pronounce the letter S before a consonant at the beginning of a word like a Z so they ZMILE when it ZNOWS; they like ZWIMMING ZLOWLY and they offer UZ a ZLICE of cake just to give a few examples.
It gives USsssssss GOOSEsssssssPIMPLES to hear that they live in a HOUZE, that they post THIZ photo on FAZEBOOK!
So if you want to speak like a native pay great attention to how we pronounce the letter S in various contexts:
You can download the picture below.
I hope you find this useful.