Contrastive Structure
"Shoulder Shifting"
Definition
Contrastive structure is showing that you are talking about two different subjects by placing them and shifting from side to side towards the directed subject.
Sentence #1
English: I like dogs not cats.
Gloss: Dogs (shift left) they, cats (shift right) they, (shift left) dogs I like (shift right) cats I don't like
Sentence #2
English: I have a brother and a sister.
Gloss: Brother (shift left) the, sister (shift right) she, I have.
Sentence #3
English: I have geometry 1st and science 3rd.
Gloss: Class, geometry 1st (shift right), science 3rd (shift left.)