N-400 一年多了都没消息，查了TIME FRAME, 大约比正常过了6个月。请问：
1. 这DELAY 会是怎样的原因？
-Case by case, had to say.
2. 如果我的CASE有问题，移民局会让我无期限等待吗？
-They will contact you if they need you top explain something.
3. 如果问题严重会不经INTERVIEW直接REJECT APPLICATION 吗？
-It should be "deny your application", "not reject", if you have got the N-400 receipt. They will contact you first and inetrview you or ask for explanation or provide more information.
如果REJECT N-400 APPLICATION会影响我的绿卡吗？
-Depends. If they find that you had fraud in the green card application, then your green card may be revoked. Otherwise, it should not affect the green card validity.
4. 我能做什么吗？-
-Contact USCIS for your case status/progress.
