Akohsi said:
But what will happened if we want to applied after my permits end ? What is that 90 days after your permits expired thing i dont understand
You have to have a valid legal status in Canada in order to apply for Inland spousal sponsorship, that's why you have to apply
before your work permit expires.
The 90 days you mentioned is the time frame in which you can apply for restoration of your status (foreign worker) once your work permit expired and you haven't applied for its extension in time. Notice that you cannot continue working while you wait for restoration of your status.
What you can also do is to apply for the extension of your work permit before it expires, thus you will be under implied status; while under implied status you can still apply for Inland sponsorship which will give you a further status until it finalizes.
But why would you wait for your work permit to expire if you are already in common-law relationship as you stated in your opening message?