The Glue That Holds Spoken French Together

French famously "swallows" its final consonants — the s in les or the t in petit is usually silent. But sometimes that silent consonant suddenly springs back to life and attaches to the next word. This is called liaison, and mastering it is what separates choppy, robotic French from smooth, native-sounding speech.

What Exactly Happens in a Liaison

When a word ending in a normally silent consonant is followed by a word beginning with a vowel or silent h, the consonant is pronounced and links to that vowel:

les amis → sounds like "lay-zami" (the s becomes a z sound)
un grand homme → the d links as a "t": "grandtomme"
nous avons → "nou-zavon"

Liaison Sound Changes

The linking consonant doesn't always keep its original sound. Three shifts to remember:

Final s and x are pronounced as z: deux enfants → "deu-zenfants"
Final d is pronounced as t: un grand arbre → "gran-tarbre"
Final f can become v: neuf heures → "neu-veures"

Obligatory Liaisons (Always Link)

Some liaisons are required — skipping them sounds clearly wrong. The main cases:

After a determiner: les_amis, un_homme, ces_enfants, mes_idées
After a subject pronoun + verb: nous_avons, vous_êtes, ils_ont, on_arrive
After a short adjective before a noun: un petit_ami, de bons_amis
After short prepositions and adverbs: en_avion, très_intéressant, plus_ou moins

Forbidden Liaisons (Never Link)

Just as important is knowing where you must not link. Making a liaison here sounds odd or even comical:

After a singular noun: un étudiant / intelligent (no link)
After et (and) — never link the t: un homme et / une femme
Before an aspirated h: les / héros, en / haut
Before onze, oui, and most foreign words

Optional Liaisons (Register Matters)

A third group is optional, and your choice signals formality. In careful or formal speech, you might link je suis_allé or ils sont_arrivés. In casual conversation, many speakers drop these. As a learner, master the obligatory and forbidden cases first; layer in optional liaisons as your ear develops.

How to Train Your Ear and Mouth

Shadow short audio clips — pause and imitate the exact linking the speaker uses.
Mark liaisons in a transcript with a small curved line, then read it aloud.
Drill set phrases like vous_êtes, nous_avons, les_enfants until the link is automatic.

In a TCF or TEF speaking test, correct liaisons make your pronunciation score rise noticeably, because they signal that you hear French in connected phrases rather than isolated words. A few weeks of focused listening is usually enough to internalize the most common links.

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