So as to avoid being late, we went by car.

We talked in a low voice so as not to be heard.

He crept out of the room very carefully to avoid waking her up.

Open the envelope carefully so it doesn't tear.

Friendly Reminder: Please keep in mind the closing time of the line you need to switch to, so as to avoid delays in your trip.

The Chinese government controlled the internet to prevent the people from knowing the truth of the Tiananmen Square Massacre.