TN簽證就要過期了，但是AP/EAD卡已經拿到了，在TN簽證過期前，需要出境轉身分嗎？
-No. Just use EAD to work, no more TN extension due to I-485 filing.
還是可以繼續待在美國，等下次出境時（TN簽證已經過期),交回TN,再用AP入境？
-You can not use TN to enter US anymore if going out of US, and have to use AP to enter US and work using EAD after you use AP to enter US.
