French language Q&A Forum

how will we conjugate  " Elle a des stylo "

Hi, in “Ce jour-là, tous les gens qui me connaissent le savent bien,” why are both connaître and savoir conjugated? There seems to be only one subject, so normally I find the second verb to be in the infinitive. 

Why isn't is "étaient"?  the subject seems to be plural--"nos parents". 

"Elle est soulagée de ne pas devoir être opérée."

Is this the infinitif passé, please?

And if not - what!

What is the difference between les transports en commun and les transports publics?

I used avoir + monte because in the notes it says this means - to go up, but the answer uses etre.  Please can someone help me with this?  Many thanks, as always!

In this lesson, Expressing Numbers from 70 to 999, the paragraph which begins "Note: Before the 1990 Spelling Reform, numbers including et as well as numbers higher than 100 didn’t include the hyphen...", has two examples, "deux cent" and "deux-cent", neither of which have "cent" written as "cents". They should have an "s" at the end shouldn't they, since they are not followed by another number? 

I did a quiz and got this question: "Which of the following adjectives are correctly placed?"

 I selected the answer above but it said it was incorrect. I thought if the adverb was 2+ syllables, then vieux would follow after. Can someone explain?