Trying to learn the adjectives

I've been learning for the past couple of days about the adjectives and I'd like to see if I really understood how to use them in the arabic language. I also have other sentences that I'd like to write.

.الكتاب جديد (The book is new)
.الكلب قبيح (The dog is ugly)
.الحقيبة خفيفة (The bag is light)
.الدراجة مكسورة (The bycicle is broken)

.السيارات بيضاء (The cars are white)
.المفاتيح قديمة (The keys are old)

.نيكولاس، هذا كتابك (Nicolas, this is your book)
.ينيس، هذه البيتزا الخاصة بك (Ines, this is your pizza)

.هذا كلب نيكولاس (This is Nicolas's dog)
.هذا خاتم ينيس (This is Ines's ring)