WHAT IF A PERSON HAS BEEN IN THE US IN 1988 AND IS ILLEGAL, BUT HAS A LEGAL FATHER AND MOTHER AND SIBLINGS, WHAT CAN BE DONE TO MAKE IT LEGAL ?.

The fact that several relatives are here legally doesn't necessarily help.  You may meet the eligibility criteria for Deferred Action for Childhood Arrivals, which would allow you to apply for a work permit, but it would not regularize your status to that of a lawful permanent resident.  You may qualify for other forms of relief, but only a lawyer carefully reviewing your situation can help you determine that.