ASL and English have different grammars. It's not suprising, therefore, that English uses several grammatical markers that are not part of ASL (and ASL uses some grammatical markers that are not part of English). For example, ASL does not use the sign AND when making lists or comparisons, although this sign is used frequently in Signed English. Instead, ASL uses a device called contrastive structure. A small, simple movement of the shoulders from one side to the other shows the distinction between two categories being discussed. The video clips show two ASL sentences:
ASL: HAVE TWO BROTHER (shift from right to left) TWO SISTER ME. English: "I have two brothers and two sisters."
The movement of the signer's body shows that he is mentioning two categories without using the sign AND. In this instance, the first group is located on the signer's dominant side (the right side for a right-handed signer), and the second group is located on the non-dominant side (the left side for a right-handed signer). [Note also that the signer returns his torso to center for the final sign ME. This final pointing sign is a "tag"; such tags are generally only used for the subject of the sentence.]
ASL: MOTHER IX(right), LIVE DALLAS (contrastive shift) FATHER IX(left), LIVES HOUSTON.
English: "Mom lives in Dallas; Dad lives in Houston."
Here the signer again uses space to mark a contrast. She shifts her body position to reflect the contrast between the two people being discussed. In this example, this left-handed signer places mom on her non-dominant side, and then puts dad on her dominant side. This is the typical strategy: the first item goes on the non-dominant side and the second item goes on the dominant side.