How do you know what is silent in French, or what isn't?
The title is the question, any help?
final e (or es) is always silent, except in one-syllable words like je or le
-ent endings for 3rd person plural forms (such as ils parlent) are always silent
in verbs that end in -er (such as aller) the r is silent
h is always silent except in ch combinations where it's usually pronounced like "sh" in shot and tch where it's pronounced like "ch" in church
final b, d, g, p, s, t, x, z are usually silent
more info here