An adjective that ends in -ING is used to describe: the characteristic or situation of a person or a thing.
#The math lesson yesterday was boring.
I had an annoying day.
An adjective that ends in -ED is used to describe: a feeling / emotions how people feel about something
#The students are amazed .
Khaled is bored.
Or
Khaled is boring.
A boring person makes you feel bored.
( tell the difference )
Here is a list of adjectives :
Tired / tiring
Annoyed/annoying
Frustrated / frustrating
Depressed / depressing
