移民大法师的答案错误！！

你在回美国后用四年加一天的 rule - 也就是回来待上四年加一天就能申请公民。

(ii) For period in excess of one (1) year. Unless an applicant applies for benefits in accordance with Sec. 316.5(d) , absences from the United States for a continuous period of one (1) year or more during the period for which continuous residence is required under Sec. 316.2(a)(3) and (a)(5) shall disrupt the continuity of the applicant's residence. An applicant described in this paragraph who must satisfy a five-year statutory residence period may file an application for naturalization four years and one day following the date of the applicant's return to the United States to resume permanent residence. An applicant described in this paragraph who must satisfy a three-year statutory residence period may file an application for naturalization two years and one day following the date of the applicant's return to the United States to resume permanent residence. (Amended 9/24/93; 58 FR 49913)