In order to become a Canadian Citizen, you must have spent 3 years out of
the past 4 years inside Canada as a permanent resident.  All time in Canada=
=20
(during the four year period that ends on the date you make the application)=
=20
that you spend as as a landed immigrant counts in full and all time in=
 Canada=20
in another status (eg. on a student visa or an employement authorization)
counts=20
half.  Short leaves of absence, for instance vacations, are usually not=20
substracted from this time . =20

You will also have to take and pass a Citizenship Exam, after which you
either=20
swear or affirm an oath to become a citizen.