If you plan to study full-time, your spouse or common-law partner may be eligible for an open work permit. He or she must pass a medical exam. An offer of employment is not required. This open work permit is appropriate if your spouse is accompanying you but is not a student. In your study permit application, you should indicate that your spouse will accompanying you to Canada. You could mention in your application cover letter that you want an open work permit for your spouse.
If your spouse wishes to study here, she should apply for his or her own study permit.