2) No 3) Yes

来源: 于 2004-09-10 10:12:12 [旧帖] [给我悄悄话] 本文已被阅读：次

Usually the path is as follows:
LC(Labor Certificate -> I140 -> I485 -> get GC stamp

You can apply for LC when you are on TN. I heard that you can also apply for I140 when you are on TN(Don't quote me on this.:) ). You'd better change to H1B when you file I485.