1
I am going shopping today.
Sign "TODAY", point to yourself for "I", sign "GO", and finally use the brushing motion of your oval handshape off your palm to sign "SHOPPING".
2
Do you like shopping?
Point to the person for "YOU", sign "LIKE", then sign "SHOPPING" by brushing your dominant hand off your non-dominant palm, while raising your eyebrows to ask a yes/no question.
3
We need to go grocery shopping.
Sign "FOOD" near your mouth, then sign "SHOPPING" by repeatedly brushing your dominant oval handshape off your open palm to show buying multiple items.