1. i'm so (exciting/excited). i have just seen a very ( interesting/interested) film 2. oh, horror films are so (frightening/frightened) i never watch them 3. i am (surprising/surprised), all my friends watch them. 4. i am always (boring/bored) when i watch them. they are so (exciting/excited)

1)i'm so excited. I have just seen a very interesting film.
2)Oh, horror films are so frightening I never watch them
3)I am surprised, all my friends watch them
4)I am always bored when i watch them. They are so exciting
На всякий случай вот правило: ed мы пишем только тогда, когда описываем чувство человека, ing мы пишем только тогда, когда описываем ну например фильм... ну ты поняла надеюсь ;)