本文发表在 rolia.net 枫下论坛加拿大移民局网上说得很清楚：4年里面住满3年可申请入籍，这4年是从你提交入籍申请之日起倒推上去的4年（1095日）。此外，这4年中，你成为永久居民后住在加拿大的天数是有一天算一天；你还未成为永久居民时，虽然也住在加拿大，但是一天只可以折算成半天。 所以你的情况是：到2008年12月，你居住的天数是2年3个月（2004/12--2008/12期间)，你还要在加拿大住一段时间才合格申请入籍。
以下内容摘自加拿大移民局网站：
What is the residence requirement?
To be eligible for Canadian citizenship, you must have lived in Canada for at least three years (1,095 days) out of the four years (1,460 days) preceding your application. Please note that you cannot meet the residence requirements for citizenship without a minimum of two (2) years as a permanent resident.
When calculating your time in Canada:
only the four (4) years preceding the date of your application are taken into account;
each day you lived in Canada before you became a permanent resident counts as half a day;
each day you lived in Canada after you became a permanent resident counts as one day;
time spent serving a sentence for an offence in Canada (e.g. prison, penitentiary, jail, reformatory, conditional sentence, probation and/or parole) cannot be counted toward residence - there are some exceptions to this rule;
absences from Canada may have an impact on your residence. Only a citizenship judge can determine if you meet the residence requirements with fewer than 1,095 days of physical presence.更多精彩文章及讨论，请光临枫下论坛 rolia.net
以下内容摘自加拿大移民局网站：
What is the residence requirement?
To be eligible for Canadian citizenship, you must have lived in Canada for at least three years (1,095 days) out of the four years (1,460 days) preceding your application. Please note that you cannot meet the residence requirements for citizenship without a minimum of two (2) years as a permanent resident.
When calculating your time in Canada:
only the four (4) years preceding the date of your application are taken into account;
each day you lived in Canada before you became a permanent resident counts as half a day;
each day you lived in Canada after you became a permanent resident counts as one day;
time spent serving a sentence for an offence in Canada (e.g. prison, penitentiary, jail, reformatory, conditional sentence, probation and/or parole) cannot be counted toward residence - there are some exceptions to this rule;
absences from Canada may have an impact on your residence. Only a citizenship judge can determine if you meet the residence requirements with fewer than 1,095 days of physical presence.更多精彩文章及讨论，请光临枫下论坛 rolia.net