Take off your hat when you enter a classroom. ✬

You can't enter the building without a permit. ✬

You can't enter here unless you have a pass. ✬

You need a passport to enter a foreign country. ✬

It is our custom to take off our shoes when we enter the house. ✬

Please enter now. ✬

I lost the door key, so I can't enter the house. ✬

You must not enter the room. ✬

No student is allowed to enter the room. ✬

Because you're a minor, you can't enter. ✬