i wanna know if this?

except that "wanna" is slang, and I'm not even sure it counts as a dictionary word (or words), the first one is. The second one is not grammatical.

from dictionary.com


Don't use it for anything other than the most lightweight writing.

you could say "how brilliant a smile I have" or "what a brilliant smile I have"

'wanna' is not slang. It is just another of the myriad normal contractions/compressions we use in speech.

hmm

how many carolgreen's will there be?

http://able2know.org/user/carolgreen616/

JTT, yeah yeah yeah, blah blah. Spelling has connotations, just as speech has connotations. As the dictionary definition quoted says, it's a written attempt to replicate dialectical or informal SPEECH. And is, for better or worse, non-standard. If you write "wanna" you come off as something of an airhead, a teenage slacker. That's one of the connotations. If that's her intention, fine, but realize that that's what you're doing if you do it.

Not slang? Are yah gonna use it wn yah signs up 4 work?

Joe(Why not? It's normal.)Nation

prolly...

Fer chrissakes Joe, quit beefin willya?

oknomorebeefin

joe(i feel freed from something)nation

The correct one ( if I correct your slang and typos) is :
'I want to show you how brilliant my smile is.'

That right, Joe, it's not slang. You probably use it daily. As S Pinker notes, everyone except a robot uses compressed speech and in doing so we all follow the rules fastidiously.

Yebbut we don't write it innit? Unless we are writing direct speech, which the original poster wasn't.

Gentlemen, focus.

This is what MJ wrote:



It's not slang. Why aren't you guys on MJ's case for his inaccurate description?




Then he gave a definition of 'wanna' from a dictionary, which showed that it is indeed a dictionary word, one that shows how it is used in English.

Here's a couple more;

http://education.yahoo.com/reference/dictionary/entry/wanna

wan·na (wän) KEY

Informal
Contraction of want to: You wanna go now?
Contraction of want a: You wanna slice of pie?

==========

http://dictionary.cambridge.org/dictionary/british/wanna

wanna
short form /ˈwɒn.ə//ˈwɑː.nə/ not standard

Definition
'want to' or 'want a'
[+ infinitive without to] D'you wanna go now?
I wanna hamburger, Mom.

==================



Not an attempt, and not dialectal; as I said, "everyone, that's every English speaker on the planet uses compressed speech patterns".

It's the recognized spelling for the representation of 'want a' or 'want to'. "nonstandard" does not in any way mean incorrect, wrong, bad speech, ... .

English speakers shouldn't be afraid of using natural patterns of their language just because there are ignorant people around that are burdened with old canards.

The Joe chimes in, offering nothing, as usual, except a big fat red herring. Of course you don't use it in formal writing situations.

What part of "informal" don't you understand, Joe?

If this is in a song, not an essay or something you can use wanna