I know that the mandatory liaisons for prepositions are the following:

Dans = In [dɑ̃]

En = In [ɑ̃]

Sans = Without [sɑ̃]

Chez = At (“z” sounds like “z”) [ ʃe] VERIFIED

Sous = Under… [su]

Dès = From [de̞]

But how about Sur = On?

As in "Sur un" is [syr œ̃] OR [sy‿rœ̃] ???

  • 1
    Salut, can you narrow this down to your question about sur and show anything you've found where it's not /syr/ ? There are cases where liaison is not mandatory with other words in your list. What is the difference between /syrœ̃/ and /syrœ̃/ for you? (‿ =/= IPA; there are no spaces or word breaks needed)
    – livresque
    Commented Dec 28, 2022 at 8:03
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    In French, unlike some languages, there are generally no verbal cues as to when one word ends and the next begins. So, ignoring context, su rêver is hard to tell apart from sur Ève et. Commented Dec 29, 2022 at 19:07
  • 1
    Look up enchaînement. Commented Dec 29, 2022 at 19:14

1 Answer 1


Liaisons are about consonants normally "mute" when no other word follows but the R in sur is always pronounced so the question about whether a liaison should be made or not doesn't exist.

The liaison is not always mandatory after chez. It is mandatory in chez eux and chez elle but not in chez Antoine or chez Élisabeth. Similar rules with sous, sans, dès...

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