The confusion between -ed and -ing adjectives can be a problem for lots of English learners when trying to improve their #grammar. The rule is fairly simple, so let's take a look:
-ed: describes how somebody is feeling about something
-ing: describes the thing/person that causes the feeling
For instance, you might send a text during maths to your best friend sitting on the other side of the classroom...
I'M BORED :O [YAWN]
and she might text you back with...
TELL ME ABOUT IT! THIS TEACHER MAKES MATHS SO BOOOOOOORING
You are feeling bored because the maths class is boring. (Of course, we chose maths as an example subject here because there's no way you'd ever find English boring....... right? :D )
Be aware that the -ing adjectives can be used to describe people as well as things. This is one reason it's important not to get the two varieties muddled up. You don't want to end up calling yourself boring!
I'M BORED :O [yawn]
TELL ME ABOUT IT! THIS TEACHER IS SO BOOOOOOORING!
In this example, you are feeling bored because the teacher is boring.
Once you've got the hang of this simple rule, you can put lots of great adjectives to work and make your English more exciting. (This will make your English teacher excited... )
tired/tiring
excited/exciting
interested/interesting
annoyed/annoying
exhausted/exhausting
humiliated/humiliating
amused/amusing
worried/worrying
shocked/shocking
disappointed/disappointing
surprised/surprising
terrified/terrifying
satisfied/satisfying
depressed/depressing
embarrassed/embarrassing
frightened/frightening
captivated/captivating
relaxed/relaxing
inspired/inspiring
motivated/motivating...
Can you think of any others? Leave them for us in a comment!