If you are physically in the U.S, you can adjust your status in the following ways:

1- Marriage to a U.S citizen or LPR. Next

2- Based upon an approved Job-based petition. - Next

3- Successful application for Asylum in the U.S - Next

Adjustment means that you are changing your status from that of an illegal, or someone who has some other non-immigrant visa, to that of a Lawful Permanent Resident.