Your understanding is mostly right.

Situation 1, if you two married before you get your green card,
a) If he filed I-485 before you get your green card, it's still concurrent filing. Most likely, your two cases will be adjudicated together. Alternative chargeability applies here.
b) If he didn't file I-485 before you get your green card, he can still apply for Follow-to-Join. No 排期 though.

Situation 2, if you two married after you get your green card, he can only apply for family based category 2A green card. And there is 排期

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• Thank you soooo much. Your explanation is sooo clear -fengjing2000- ♀ (26 bytes) () 12/06/2007 postreply 14:18:25

• 回复：Your understanding is mostly right. -sdfsdfsdff- ♀ (474 bytes) () 12/06/2007 postreply 15:47:26

• Just saw your post. Thank you for clarification. -fengjing2000- ♀ (0 bytes) () 12/07/2007 postreply 07:12:27