Bored or Boring

There are many adjectives that can have two forms, those that end in -ed and those that end in -ing. For example, interested and interesting, or bored and boring. So, how do we use these two adjective forms? Basically...

-ed adjectives are used for feelings, and

-ing adjectives are used characteristics.

Look at the difference:

Sally is bored because she doesn't know what to do.

Sally is boring because she never wants to do anything.

In the first sentence, we are describing how Sally feels, but this feeling is temporary. In the second sentence, we are describing Sally's personality, which is unlikely to change.

I can see the students are yawning and not paying atention.

The class is bored. / The class is boring. 

An object, like a classroom can't feel, so in the first sentence, we must be talking about the students, who do not feel interested. On the other hand, the second sentence means that the students don't find the subject of the class, or what is being taught, to be interesting.


Can you see the difference in the following sentences?

I'm satisfied with the work you've done. / My job is very satisfying..

He's really excited to meet her. / That date was very exciting.

She's terrified of spiders. / That horror movie was terrifying.

Even though these adjectives are confusing... 
I hope you aren't confused anymore.