Why didnt we say : On ne doit pas parle la bouch pleine
instead of On ne doit pas parler la bouch pleine
since it is ER ending verb is that the right way ?
Here a link to 'devoir' in Le Présent - look at the examples and you will see that when 'devoir' is followed by a verb, it is always in the infinitive form.
Je dois parler à Sophie = I have to talk to Sophie
Il doit faire ses devoirs = he has to do his homework
The same applies with 'pouvoir' .
I hope this si helpful.
Bonne journée !
Sara, I might be a bit late but if not, DEVOIR is a helping verb like MUST, SHOULD, HAVE TO, MAY in English. He must go now not He must goes now.... In French you have to conjugate the helping verb DEVOIR and this becomes DOIT (for "one" but the infinitive (full verb) remains unchanged.
Hence On ne doit parler ..................
Hope this helps.
Hence On ne doit
Sign in to submit your answer
Don't have an account yet? Join today
Test your French to the CEFR standard