The ligaments are then able to do their job and support the skeletal structure.
(The ligaments; are; T:then; able to do their job and support the skeletal structure) (The ligaments; to do; their job) (The ligaments; to support; the skeletal structure)
The ligaments The ligaments The ligaments
are to do to support
T:then able to do their job and support the skeletal structure
their job
the skeletal structure