Cheat sheet

M before b and p in French: lampe, temps and simple

A practical spelling sheet for am, em, im and om. See which nasal vowel each spelling gives, keep the consonants you hear, and remember bonbon.

In short

Inside a French word, a nasal vowel usually takes m before b or p: lampe, chambre, simple. The m marks nasalisation rather than a separate /m/ sound. Bonbon is a familiar exception that keeps n.

Yellow the idea to rememberBlue French to learnRed watch out

A navy bedside lamp beside a small dish of sweets in a bright bedroom.
Lampe and bonbon show where French uses m before p or b. Illustration: Atelier

Les voyelles nasales · m devant b et p

1 · Am and em often give /ɑ̃/

Compare lampe /lɑ̃p/ and temps /tɑ̃/. The spelling uses m even when the following consonant letter is silent.

La lampe est sur la table.The lamp is on the table.

Nous avons le temps.We have time.

2 · Im often gives /ɛ̃/

In simple /sɛ̃pl/, the nasal vowel is followed by /p/ and /l/. Keep those two consonants.

un timbre /tɛ̃bʁ/a stamp
important /ɛ̃pɔʁtɑ̃/important

La réponse est simple.The answer is simple.

3 · Om often gives /ɔ̃/

The spelling in nombre /nɔ̃bʁ/ has the same nasal vowel category as nom /nɔ̃/. The following /bʁ/ remains.

Le nombre de chambres est indiqué ici.The number of bedrooms is shown here.

4 · Keep bonbon with n

Learn bonbon as a whole word. Other exceptions include néanmoins and embonpoint.

Tu veux un bonbon ?Would you like a sweet?

5 · Keep each word’s spelling across a space

In un bon pain, the next word starts with p, but bon keeps its n. This spelling convention works inside a word.

C’est un bon pain de campagne.It’s a good country loaf.

6 · A pronounced m has its own pattern

In ami /ami/, the vowel before m is oral and /m/ is pronounced. The letter alone is not enough: read the whole word.

Mon ami arrive demain.My friend arrives tomorrow.

Four spellings to remember by sight

Why is it m before b and p in French?

Which consonant follows the nasal vowel?
WordSound after the nasal vowelMeaning
lampe /lɑ̃p//p/lamp
temps /tɑ̃/nonetime
simple /sɛ̃pl//pl/simple
nombre /nɔ̃bʁ//bʁ/number

Lampe and temps both contain /ɑ̃/, but only lampe ends with /p/. So the spelling step and the pronunciation step need separate attention: first choose the nasal spelling, then keep the consonants in the complete word. Say La lampe est dans la chambre to move from one spelling pattern to two.

Question 1No account needed
Which spelling means “a lamp”?

Choose one answer.

Answer and explanation

une lampe. Lampe uses m before p. Its pronunciation /lɑ̃p/ ends in a pronounced /p/.

Question 2No account needed
Which word keeps n before b?

Choose one answer.

Answer and explanation

bonbon. Bonbon keeps the spelling of bon and is a useful exception to remember.

Question 3No account needed
What follows the nasal vowel in temps /tɑ̃/?

Choose one answer.

Answer and explanation

No consonant. The final written p and s are silent in temps said on its own.

Sources and further reading