Liaison and Enchaînement in French

Overview

Liaison and enchaînement are two fundamental phonetic linking processes that shape how French sounds in connected speech. While you have been encountering these phenomena since your first French lesson, understanding the rules at the C1 level means knowing exactly when liaison is required, when it is forbidden, and when it is optional — with the optional cases being a powerful marker of register and style.

Liaison occurs when a normally silent final consonant is pronounced because the next word begins with a vowel or silent h. For example, the s in les is silent before a consonant (les chats) but pronounced as [z] before a vowel (les [z]enfants). Enchaînement is the simpler process of linking a pronounced final consonant to the next vowel: une [n]amie, il [l]arrive.

These processes are what give French its characteristic flowing, connected quality. Mastering them is essential for both comprehension (understanding fast native speech) and production (sounding natural rather than choppy).

How It Works

Required Liaisons (Obligatory)

These must always be made in all registers:

Context	Example	Liaison sound
Article + noun	les [z]enfants	[z]
Adjective + noun	un grand [t]homme	[t]
Pronoun + verb	vous [z]avez	[z]
Verb + pronoun (inversion)	est-[t]il	[t]
After one-syllable prepositions	en [n]été, dans [z]un an	[n], [z]
After très, plus, moins	très [z]important	[z]
Fixed expressions	tout [t]à coup, de temps [z]en temps	varies
Number + noun	deux [z]ans, trois [z]heures	[z]
c'est, il est + vowel	c'est [t]ici	[t]

Forbidden Liaisons

These must never be made:

Context	Example	Why forbidden
After et (and)	et / il (no [t])	Historical rule
After singular noun	un étudiant / intelligent	Noun-adjective boundary
Before h aspiré	les / héros, en / haut	Aspirated h blocks liaison
After proper names	Robert / arrive	Proper noun boundary
Before onze and oui	les / onze	Special words
After interrogative inversion	Vient-il / aussi?	Between inversion group and rest

Optional Liaisons (Register Markers)

Context	Informal (no liaison)	Formal (with liaison)
After pas	pas encore	pas [z]encore
Verb + complement	je suis allé	je suis [z]allé
After plural noun	des enfants intelligents	des enfants [z]intelligents
After auxiliary	ils sont arrivés	ils sont [t]arrivés

Liaison Consonant Sounds

Written letter	Pronounced as	Example
s, x	[z]	les [z]amis, deux [z]ans
t, d	[t]	petit [t]ami, grand [t]homme
n	[n]	un [n]ami, en [n]été
r	[r]	premier [r]étage (rare)
p	[p]	trop [p]aimable (rare, formal)

Enchaînement

Unlike liaison, enchaînement simply carries an already-pronounced consonant into the next syllable:

Written	Spoken syllable division	Note
une amie	u-na-mi	Final [n] links to next vowel
il arrive	i-la-riv	Final [l] links
cette année	cè-ta-née	Final [t] links
elle habite	è-la-bit	Final [l] links

Examples in Context

French	English	Note
les [z]enfants	the children	Required: article + noun
un grand [t]homme	a great man	Required: adjective + noun
et / il (no liaison)	and he	Forbidden: after et
pas [z]encore (formal)	not yet	Optional: formal liaison
vous [z]avez raison	you are right	Required: pronoun + verb
c'est [t]une bonne idée	it's a good idea	Required: c'est + vowel
deux [z]heures	two o'clock	Required: number + noun
un petit [t]ami	a boyfriend	Required: adjective + noun
les / héros	the heroes	Forbidden: h aspiré
très [z]important	very important	Required: after très
Comment [t]allez-vous?	How are you?	Required: inversion
en [n]Italie	in Italy	Required: preposition + vowel

Common Mistakes

Making liaison after et

• Wrong: et [t]il est parti
• Right: et / il est parti (no liaison)
• Why: Liaison after et is always forbidden. This is one of the most absolute rules in French phonetics.

Liaising before h aspiré

• Wrong: les [z]haricots
• Right: les / haricots (no liaison)
• Why: Words beginning with h aspiré block liaison. You must memorize which words have aspirated h (haricot, héros, honte, haut) versus mute h (homme, heure, hôtel).

Skipping required liaisons

• Wrong: Pronouncing les enfants as les / enfants without the [z]
• Right: les [z]enfants
• Why: Required liaisons cannot be omitted in any register. Skipping them sounds unnatural and can impede comprehension.

Over-liaising in casual speech

• Wrong: Making every possible optional liaison in casual conversation
• Right: Save optional liaisons for formal contexts
• Why: Making too many optional liaisons in casual speech sounds affected or overly formal. Native speakers naturally reduce optional liaisons in relaxed conversation.

Usage Notes

The number of optional liaisons a speaker makes is one of the most reliable indicators of register in spoken French. A newsreader or public speaker will make significantly more liaisons than friends chatting at a café. This makes optional liaison a powerful tool for adjusting your speech to the situation.

The treatment of h aspiré is one of the trickiest aspects of French phonetics. There is no phonetic difference between aspirated and mute h — the distinction is purely historical and must be memorized for each word. Dictionaries mark h aspiré with a special symbol.

In singing and poetry, liaison rules are extended — nearly all possible liaisons are made to maintain rhythm and flow. This is why French songs and verse sound particularly connected.

Enchaînement is automatic and universal — unlike liaison, it does not vary by register. Any pronounced final consonant before a vowel will link across the word boundary.

Regional variation exists: speakers in southern France and in some African francophone countries tend to make more liaisons, while Parisian casual speech makes fewer optional ones.

Practice Tips

1. Listen to French radio news and a casual French podcast back to back. Note the difference in the number of liaisons — the news will have significantly more. This trains your ear to recognize register through liaison patterns.
2. Read a French text aloud and mark every potential liaison point. Classify each as required, forbidden, or optional. Then read the text twice: once making all optional liaisons (formal) and once omitting them (casual).
3. Memorize the 20 most common h aspiré words (haricot, héros, honte, hasard, haut, hibou, etc.) — these are the main stumbling points for liaison errors.

Related Concepts

This concept has no direct parent or child relationships in the grammar tree.