我是两年前通过H1B得到的绿卡，先生以前是H4来美，近两年都是B2. 现在他想申请绿卡。我翻看了相关的帖子，我的理解是：
1. 他目前B2的身份在美国，他可以直接file 485；
2. 他需要等2-3个月后再file 485吗？-He had better wait for two to three months to file I-485 in case USCIS consider that he has the immigrant intent before he entered US using B2 visa (visa fraud).
3. 他的B2是6个月的，到期了怎么办？需要离开美国再入境吗？ 那时用什么签证？-After he files I-485, he can legally stay in US to wait for the green card approval even if the 2 status expires. If he wants to leave US during I-485 pending, he needs to apply for advance parole to travel.
谢谢8老师一直提供专业的帮助。
