what are my chance as an illegal alien,wanting to get married to US citizen?I come to US legally but I can't prove it cuz I use somebody document.

Hello, If you presented yourself to an immigration officer at the time of entry you may be able to adjust status in the US, however not only would you have to show you did in fact present yourself for inspection you would also need a waiver of inadmissibility for having misrepresented yourself to an immigration officer. Please contact me for a free consultation to further advise on your specific case.