You drop the mute "e" and add an apostrophe because the next word begins with a vowel sound.
Example: J'ai = I have
The "e" of je dropped because "ai" begins with a vowel sound.
What is elision
sept
What is 7?
J'aime
What is "I like"?
J'aime chanter.
What is "I like to sing."
You pronounce a normally silent "s" like a "z" because the next word begins with a vowel sound thereby linking the two words together.
Example: les amis = the friends
What is liaison?
douze
What is 12?
Je n'aime pas
What is "I don't like"?
J'aime jouer au football.
What is "I like to play soccer".
The masculine singular form of "the"
What is "le"
vingt-huit
What is 28?
Je deteste
What is "I hate"?
J'aime faire les magasins.
What is "I like to shop".
The plural form of "the"
What is "les"?
trente-neuf
What is 39?
The phrase for "there is or there are"?
What is "il y a"?
quarante-cinq
What is 45?