French language Q&A Forum

Following other answers, I'm much clearer but what is "an instance where the verb following «on» changes from the third persona singular to, usually, a plural tense and agrees correspondingly".

And, to be clear, when "on" = "we" it's still singular .... on a dit, here?

Do you like pizza? is a question about pizza in general. Therefore according to the lesson it should be C'est but the answer given is Elle. I think either the answer or the lesson should be changed.