As a verb:
* The government banned the sale of plastic bags.
* The school banned the use of cell phones during class.
* My parents banned me from watching TV after 9 pm.
* The doctor banned her from eating spicy food.
* He banned the use of profanity in his office.
As a noun:
* The city imposed a ban on smoking in public spaces.
* There is a ban on alcohol in the school building.
* The new ban on plastic straws has generated controversy.
* The ban on guns in the park was unpopular with many residents.
* He was given a lifetime ban from the stadium for his actions.
Other uses:
* The judge issued a restraining order, effectively banning him from contacting his ex-wife.
* The website is banned in several countries.
* His book was banned by the censors.
Remember to choose the correct form of "ban" depending on the context of your sentence.