Every morning, the students raise the flag of the country.
To put emphasis on who or what is doing the action (active voice):
The students raise the flag of the country every morning.
To put emphasis on who or what the action is being done to (passive voice):
The flag of the country is raised by the students every morning.
To put emphasis on when or where the action takes place (in active voice):
Every morning, the students raise the flag of the country.
To put emphasis on when or where the action takes place (in passive voice):
Every morning, the flag of the country is raised by the students.