modern / the buildings / be / , / attractive / the city / look / .
The more modern the buildings are, the more attractive the city looks.
polluted / the air / get / , / unhealthy / people / feel / .
The more polluted the air gets, the more unhealthy people feel.
wide / the streets / be / , / easy / it / be / to drive / .
The wider the streets are, the easier it is to drive.