I. same as -ʸs verb
Etymology: contraction of is, has, does
Date: 1584
1.
a. : is
she 's here
b. : was
when 's the last time you ate?
2. : has
he 's seen them
3. : does
what 's he want?
II. s pronoun
Etymology: by contraction
Date: 1588
: us — used with let
let 's