السلام عليكم ورحمة الله وبركاته,
One of a the reasons why a noun can be in a state is that it is a تَابِع (grammatical follower of another word).
There are four kinds of grammatical followers (i.e. they come after a word and follow it in status):
Until next time, السلام عليكم
Like this post? Simply enter your e-mail and click “Yes, include me!” for updates