extraordinaire as an adjective

Question

This was a sentence in the lesson: Ce soir-là, quelque chose d'extraordinaire se produisit.

Why is it not "quelque chose extraordinaire"? Why is it "d'extraordinaire?"

Thanks for the explanation!

Accepted Answer

Hi Carole,
It is a particularity of some expressions -
Quelque chose, rien, quelqu'un,  have to have a 'de' before the adjectives that follow them.
e.g
Il n'y a rien de bon à manger ici = There's nothing good to eat here
C'est quelqu'un de très motivé = He is a very motivated person
Take a look at the following Kwiziq lesson -
https://french.kwiziq.com/revision/grammar/how-to-say-something-special-quelque-chose-de-special
Hope this helps!