Can I work in the US while I my application for adjustment of status is pending?
Yes. When you file the adjustment of status application, you automatically file for employment authorization.
Employment authorization will take approximately 75 to 90 days to be approved. You are not supposed to work prior to obtaining an employment authorization.
Yet there are approximately 11 million people in the United States working without authorization.
You should not work. However, if you are filing to obtain your permanent resident status through a spouse, working without authorization will not negatively affect you in obtaining an adjustment of status.