-You have no problem to sponsor your mother' GC application even if her b2 visa已經過期 (this doe not affect her GC application).
還有這種情況要不要請lawyer.
-It is simple procedure and you may try to do it by yourself.
另外,如果申請都需要天什麽表格。
-I-130, I-485, I-864, I-131 (for AP) and I-765 (for EAD). Just check the recent posts in this forum and you will find a lot of related questions and answers here.
多謝了!!!!!