Not necessary.

幫國內的朋友問：
親屬移民排期到，一家三口共有一個case ID, 現在丈夫不想要美國綠卡，請問妻子和孩子可否先申請綠卡？
-Depends on whether the husband is the primary beneficiary (i.e. his parent or brother/sister filed I-130 for him). If yes, then the wife and child can not apply for the immigration visa or file I-485 unless the husband also does it at the same time. Otherwise, if the wife is the primary beneficiary, then it is fine for the wife and the child to apply for the green card without the husband involvement. 

以後丈夫還可以自己另外申請綠卡嗎？

考古了一下，沒有看到類似的帖子~
所以在這裏請教一下，謝謝！

所有跟帖： 

• 多謝！（內容同） -郝斯佳- ♀ (9 bytes) () 04/19/2015 postreply 18:15:13