To be eligible for a green card, also known as lawful permanent residency, you typically need to meet one of several categories, such as family-sponsored, employment-based, refugee/asylee, or diversity visa lottery. The specific eligibility requirements can vary depending on the category you fall into. In most cases, you'll need a sponsoring family member or employer, meet certain background and health criteria, and adhere to immigration regulations. It's important to consult with an immigration attorney to assess your unique situation and determine the most suitable path to green card status.

The ability to work in the United States while your visa or green card application is pending depends on your visa category and the specific work authorization associated with it. Some visa categories, like H-1B or L-1, allow you to work for the sponsoring employer as long as you maintain your status. If you're applying for a green card, you may be eligible for employment authorization through a work permit (EAD). However, it's essential to follow all immigration regulations and consult with an immigration attorney to ensure you are in compliance with U.S. employment laws.

If your visa is about to expire, and you require additional time in the United States, you have several options. You can apply for an extension of your current visa status if eligible. Alternatively, you may explore changing your status to a different visa category, such as transitioning from a student visa (F-1) to a work visa (H-1B) or applying for a tourist visa (B-2) extension if you need more time for tourism or family visits. In some cases, you might also be eligible for a grace period or a visa waiver program. It's crucial to consult with an immigration attorney to determine the best course of action based on your circumstances and immigration goals.