回复：多谢高手！最后一问:

多谢高手！最后一问:
如果我妈妈在一个月（７月１０日前）内离开美国， 她可以用这个B２签证在１０月份入境么？
-No. Her B2 visa has been invalid due to the extension denial. Just as PJiang's said, your mother can just stay in US and then, you can sponsor her green card application after you become a US citizen. Her unlawyful presence does not affect her GC application under your sponsor.