Here are some examples of how you can use "magnifique" in a sentence:
* "Le château est magnifique." (The castle is magnificent.)
* "La vue de la montagne est magnifique." (The view from the mountain is splendid.)
* "Tu es magnifique dans cette robe." (You look magnificent in that dress.)
It's a very versatile word and can be used to express admiration and appreciation for a wide range of things.