回複：綠卡配偶過不來，準備放棄綠卡換H1簽證，H1能給幾年

. 新H1簽證的有效期是怎麽計算的？ 因為已經用了4年半了，是不是還有一年半可以用；因為綠卡也用了半年多了，是不是用綠卡的這段時間也會算到H1的時間裏？因為還在同一個單位，感覺象是H1延期一樣。
H-1B period is calculated by the days you actually spent under this status. Therefore, it seems that you only used four years and a half. Under the law, you can reapply a new H-1B which may be valid for another year and a half.

2. 現在H1在單位和移民局用的時間長，移民局那裏經常要四、五個月才能批。新H1的生效時間通常是從遞交的時間就開始算了，這樣的話，僅剩的1年半H1的時間就浪費了很多。有沒有辦法讓新的H1的生效時間從移民局批準的那天開始算起。
The H-1B period does not begin at the date your employer filed the petition. If you want to expedite it, you may try the premimum processing which requires USCIS to process the petition within 15 calendar days.

3. 如果用綠卡超過一年時間是不是可以獲得新的一輪H1？也就是說另外6年的H1？

The USCIS guidance requires to be physically outside the U.S. for the year immediately prior to the year when a U.S. employer petitions for a new H-1B. In other words, a former H-1B holder may physically stay outside U.S. for a year in order to be qualified for a new H-1B with a maximum period of six years.
4. 因為放棄綠卡了，到時候老婆申請H4時是不是有問題，因為我這裏已經放棄綠卡了。
Generally speaking, it should not be a problem. But you may consider consulting an immigration attorney.

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