"have to", "should" y "must", 

In the academic realm, students must attend classes regularly and must actively participate in discussions. They have to complete all assignments on time and should study diligently for final exams. Additionally, students should adhere to academic conduct guidelines and must collaborate with peers on group projects.


Turning to the professional environment, employees must arrive punctually for work and must adhere to their designated schedules. They have to follow company policies and procedures and must complete their assigned tasks accurately and efficiently. Effective communication is also crucial, as employees should communicate effectively with colleagues and supervisors. Moreover, they must maintain a safe and respectful workplace environment.