1. Smoking is not allowed in the ward.
⇒ Would you mind not smoking in the ward?
Would/ Do you mind V-ing ...?
2. I wanted to finish my homework, so I stayed up late last night. (as)
⇒ I stayed up late last night so as to finish my homework.
3. The thick fog prevented me from driving to work. (made)
⇒ The thick fog made it impossible for me to drive to work.
$#minosuke$