We use adjectives after the link verbs;to feel,to look,to appear,to taste,to smell,to be,to seem,to become,to sound

f.ex.The pillow felt soft.

The rose smells nise.

Here adjectives modify the subject,not the predicate.Thats why we use here adjectives after link verbs as we have already mentioned above.

F.ex.He looks happy.

I feel bad.