These are parts of speech that cannot exist on their own, and they must attach to Phrases, as the Semantics of the clitic is dependent on the phrase. Different from Affix, as it does not attach to Word
Types
Syntactic Gap
These are clitics that expect another word to follow from it
Stress Patterns
If a clitic is commonly associated with a stressed verb, then they will conjoin in Word Formation.
I AM -> I'M
Examples
it's <- 'swould've <- 've