1. "Would like" is signed by using the sign for "want" (a "W" shape made with your dominant hand, moving back and forth from your chest to your palm) followed by the sign for "to" (index finger pointing out, moving slightly forward).
2. "A" is signed by using the sign for "one" (index finger extended, tapping the palm of your other hand).
3. "Bag" is signed by making a "B" shape with your dominant hand, placing it on your shoulder, and then moving it down in a curved motion as if you are carrying a bag.
Therefore, to sign "would like a bag" you would combine the signs for "want", "to", "one", and "bag" in the following sequence:
* "Want"
* "To"
* "One"
* "Bag"
Context is important! You should also use facial expressions and body language to convey your request. For example, you might look at the bag and then look at the person you're asking, with a questioning expression on your face.
Note: This is a simplified explanation, and the exact signs and their order may vary depending on the regional variations of ASL and individual signers.