Using adjectives ending in -ed and -ing
Many verbs refer to feelings—for example, bore, confuse, excite, frighten, interest. The present participles of such verbs, which end in -ing, and the past participles, which end in -ed, can be used as adjectives.
Use the -ed (past participle) form to describe a person having the feeling.
The frightened boy started to cry.
Use the -ing (present participle) form to describe the thing or person causing the feeling.
The frightening movie gave him nightmares.
Be careful not to confuse the two types of adjectives.