<p>are you asking how you know whether or not to sound out the s at the end of words?
if the word after the les begins with a vowel, you usually sound out the s
ex- les afriques</p>
<p>Most last letters in French are not pronounced. As a rule, the only ones that are usually are consonants with the beginning letter of the next word a vowel or the letter “H.” Then, you carry over the sound of the last letter to connect the two words. This is called “liason,” a word you probably know.</p>
<p>Ex:
“The friends went to the beach.”
*Les amis sont allee a la plage.<a href=“sorry,%20no%20accent%20marks”>/i</a>
The “s” in “les” would be pronounced because you would connect the words “les” and “amis.”</p>
<p>“The boys are very fast.” Les garcons sont tres vites.
The “s” would not be pronounced because the next letter is not a vowel or the ever-silent letter “H.”</p>