The missing sound files will be added very soon. J'ai une soeur. Elle a huit ans.
Liaisons are links between words.
This rule is generally true but its scope is limited to separate words. When words are assembled in a sentence, this rule is no longer applicable. That's what we call a liaison . You cannot use liaison between all words. A liaison takes place only when the first word terminates with a consonant and when the second word begins with a vowel.