"I am amazing" vs. "I am amazed"

[stone]

English Grammar Tests, Elementary Level

ESL/EFL Test #34 "Responses (7)", question 8

Jill: 'Look at all the work I've done, aren't you impressed?'
Frank: '.........'

(a) I am amazing!
(b) I am amazed!
(c) I amaze!
(d) I am being amazed!

English Grammar Tests, Elementary Level

ESL/EFL Test #34 "Responses (7)", answer 8

Jill: 'Look at all the work I've done, aren't you impressed?'
Frank: 'I am amazed!'

Correct answer: (b) I am amazed!

Your answer was: incorrect
Jill: 'Look at all the work I've done, aren't you impressed?'
Frank: 'I am amazing!'
_________________________

please explain why not 'I am amazing!'

thank u

stone

[Mister Micawber]

.
Hello, Stone.

The -ing form expresses the quality of the experience itself: a circus is amazing, a long journey is tiring, an adventure movie is exciting.

The -ed form is the condition of the experiencer: I am amazed by the circus, I am tired from the journey, I am excited after seeing the movie.

An easy way to remember:

The thing is -ing, and -ed is me.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber