1
I need to go to the market.
To sign this, start by pointing to yourself for 'I', then sign 'NEED' with a hooked 'X' hand moving down. Sign 'GO' by pointing both index fingers forward, and finish with the repeated wrist-swinging motion for 'MARKET'.
2
The farmer's market is open today.
Begin by signing 'FARMER' using the '5' handshape brushing across your chin, followed by the person marker. Then sign 'MARKET'. Finish by signing 'OPEN' with flat hands pulling apart, and 'TODAY' using 'Y' hands bouncing downward.
3
What did you buy at the market?
In ASL, you would structure this as 'MARKET, YOU BUY WHAT?'. Sign 'MARKET', point to the person for 'YOU', sign 'BUY' by handing over imaginary money, and sign 'WHAT' with open hands shaking slightly while furrowing your eyebrows.