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It's okay to cross the road at the red traffic light.
You can/ can't
It's not necessary to buy books for this course.
You don't have to buy...
It's not okay to drive after two beers.
You can't drive...
It's not okay to drive faster than 120km/h
You can't drive...
It's necessary to have a driver's licence.
You have to have...
It's not necessary to speak fast. It's necessary to speak correctly.
You don't have to speak...you have to speak...
Do you have to buy a new Andante card for every trip?
Do you have to drive slow near pedestrian zones?
Can you rent a bicycle for free?
Can you take a bus from Porto to London?
It's impossible to drive here = You don't have to drive here.
Wrong! You can't drive here.
The rule says "Pay 2 euros for parking" = You can pay 2 euros for parking.
Wrong! You have to pay 2 euros for parking.
You can't speak Portuguese in the classroom = You don't have to speak Portuguese in the classroom.
Wrong!
It's possible to drive your car to the beach. It's not necessary to take a bus.
You can drive... / You don't have to take...
