Thanks,
@scylla for the prompt response. This means that I will have to decide to permanently move to Canada immediately. This will be little difficult. Just in case my PR expires, what will be my options. One more thing that I want to mention is when I got the PR I wasn't married. Now I am married and have a small baby. Does this any impact. I mean for now, I will travel alone but does it also mean wont be able to sponser them? And if I can't sponser them, what are the options for them to travel.
sorry for asking so many questions together
If your PR expires, then you will need to apply for a PR Travel Document in order to be able to return to Canada. Since you don't meet the residency requirement, you would need to apply under H&C and provide a strong argument for why you have remained outside of Canada and not met the residency obligation. Working outside of Canada, attending school or having a family outside of Canada generally are not accepted as reasons.
The fact you have a family without PR status now complicates the situation. Let's say you fly back before your PR card expires and are able to enter Canada without being reported, you will then need to wait two years (until you meet the residency requirement) before you will be able to sponsor your family for PR. They can apply to visit you in Canada on a TRV but approval is not guaranteed.
If you can get a PRTD approved under H&C, then you can sponsor them as soon as you arrive in Canada. Again, they can apply for a TRV but not guaranteed they will be approved. You will also need to remain in Canada for the majority of the time while their PR sponsorship application is being processed. Expect this to take 1 to 1.5 years.
What are your H&C reasons for having remained outside of Canada?