1
I need a piece of paper.
Sign 'I' by pointing to yourself, then sign 'need'. Finally, perform the 'paper' sign by bringing your flat dominant hand down to clap against your upward-facing non-dominant hand, ensuring your fingers point in opposite directions.
2
Where is the paper?
First, sign 'paper' using the flat-handed clapping motion described. Then, sign 'where' by holding up your dominant index finger and shaking it side to side, while furrowing your eyebrows to show you are asking a question.
3
Please hand me that paper.
Start by signing 'please' with a flat hand rubbing your chest in a circle. Next, sign 'paper' by clapping your flat palms together with fingers pointing opposite ways, and finish by pointing directly at the paper.