Well, you want to try? ;-)

 If you can read this poem to the end and at the same time  pronounce all the words correctly, then you speak English better than 90% of English speakers in the world.

Dearest creature in creation,
Study English pronunciation.
I will teach you in my verse
Sounds like corpse, corps, horse, and worse.
I will keep you, Suzy, busy,
Make your head with heat grow dizzy.
Tear in eye, your dress will tear.
So shall I! Oh hear my prayer.