回複：求助：給媽媽在網上填申請B2延期表（USCIS ELIS)，有一個問題，不太肯定怎麽填

"Are you a B-2 visitor applying to extend your stay, or are you applying to change your status to that of an F-1 or M-1 student? "

答案是選YES OR NO。 這個問題的的前半部分，我應該選YES， 後半部分應選NO。 有些糊塗了。還是我理解有誤。 -You can not e-file the B2 extension, but use paper-filing. See this e-filing of I-539 and you can see there is not e-filing of B2 extension available:

http://www.uscis.gov/portal/site/uscis/menuitem.5af9bb95919f35e66f614176543f6d1a/?vgnextoid=ac3d8424f8304110VgnVCM1000004718190aRCRD&vgnextchannel=9059d9808bcbd010VgnVCM100000d1f1d6a1RCRD