Je changes to j’ before a verb starting with a vowel or a silent h (ex.j’adore, j’habite)
La liason (linking)
the s in plural pronouns (nous, vous, and ils/elles) is usually silent
except when it is followed by a verb that begins with a vowel sound. In such a case the silent s is pronounced as a /z/ and links the pronoun to the verb. This phenomenon is called liaison (‘linking’) and is very characteristic of French.