Correction
如果我在等待期间被LAID OFF,马上找到TN工作,然后再转H1-B,我可以不用出境吗?可以继续用剩余H1-B的期限吗?(按你说的H1-B有3年的延期在I-140批准以后)
-Yes as long as you change your status to TN before you are laid off, you can change it back to H1 later with the approved I-140 or one year PERM.