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Becoming a Canadian Citizen
Here is useful information about becoming a Canadian citizen. Read this page to decide if you are ready to take this step.
To become a Canadian citizen, you must:
be 18 years of age or older; 
be a permanent resident of Canada; 
have lived in Canada for at least three of the four years before applying; 
be able to communicate in either English or French; 
know about Canada; and 
know about the rights and responsibilities of citizenship; 
Please note that time spent in Canada before becoming a permanent resident may be counted toward becoming a Canadian citizen if it falls within the four-year period. To find out if you meet the residency requirements to become a Canadian citizen, you can use the residency calculator.
A child (under 18 years of age) must be a permanent resident of Canada to apply for Canadian citizenship. To apply on behalf of your child, you must either:
already be a citizen; or 
apply for citizenship together as a family. 
Children do not need to have lived in Canada for three years before applying.
Citizenship Test
If you are between the ages of 18 and 54, you must pass a citizenship test. For more information on Canada and the citizenship test, read the on-line study guide A Look at Canada.
Who cannot become a Canadian citizen?
Before you apply, you should make sure that you are eligible for citizenship. You cannot become a Canadian citizen if you:
are under a removal order; 
are now charged with an indictable criminal offence; 
have been convicted of an indictable criminal offence in the past three years; 
are now in prison, on parole, or on probation; 
are being investigated for or have been convicted of war crimes; or 
had your citizenship revoked in the last five years. 
Please note that time spent in prison, on parole or on probation may not be counted toward becoming a citizen.
http://www.cic.gc.ca/english/citizen/be ... howto.html