败给你了。内详

A petition requesting an extension of stay for an employee in the U.S. must be filed with a copy of the Form 1-94, Nonimmigrant Arrival/Departure Record, of the employee(s), and a letter from the petitioner explaining the reasons for the extension. [Family members should use Form I- 539 to file for
an extension of stay.] A nonimmigrant who must have a
passport to be admitted must keep that passport valid during his/her entire stay. If a required passport is not valid, file a full explanation with your petition. Where there has been a change in the circumstances of employment, also submit the evidence required for a new petition.
Where there has been no change in the circumstances of
employment, file your petition with the appropriate
supplement and with your letter describing the continuing employment, and:

if for H-1B status, submit an approved labor condition
application for the specialty occupation valid for the
period of time requested.