In the sentence frame below, the first
word (subject) of the pair improves or
stimulates the second word (object) in
some way.
 
A/The ____ add(s)/aid(s) a/the ___.
 
Competition is to progress as spices
are to flavor.
 
Competition aids progress and spices
add flavor.
 
Be sure to remember that the word pair
may be reversed. The following
sentence frame is the reverse of the
one above. In this frame the subject
hinders the object.
 
A/The _____ prevent(s) (a) _______.
 
Muzzle is to biting as vaccine is to
disease.
 
A muzzle prevents biting and a vaccine
prevents disease.
