1。聽說H1B簽證加延期一共可以有六年時間，可是當我在第一家公司工作兩年後，換到另一家公司，H1B轉換後有效期還是三年，這樣我還能再延三年嗎？
At the end of the 5th H1 year:
You can only extend 1 more year if you don't meet the requirement for H1 beyond 6 years.
You can extend 2 more years if you have LC/I-140 pending for over 365 days. (6year+1year)
You can extend 3 more years if you have I-140 approval. (6year+3year but subject to max 3-year per petition)
At the end of the 5th H1 year:
You can only extend 1 more year if you don't meet the requirement for H1 beyond 6 years.
You can extend 2 more years if you have LC/I-140 pending for over 365 days. (6year+1year)
You can extend 3 more years if you have I-140 approval. (6year+3year but subject to max 3-year per petition)
