All correct? Lay and Lie

He lay in the sand. (A second ago)

He lies in the sand. (Right now)
NEVER: He lie in the sand.
He lay in wait for his prey. (A second ago)
He lies in wait for his prey. (Right now)
NEVER: He lie in wait for his prey.
Come over and lie down.
NEVER: Come over and lay down.
The dog lay by my feet. (A second ago)
The dog lies by my feet. (Right now)
The prisoners lay on the pavement. (A second ago)
The prisoners lie on the pavement. (Right now)
The prisoner lies on the pavement. (Right now)
The prisoners lay on the pavement. (A second ago)
Come lie down. Good?
He lies on the beach. (Right now)
He lay on the beach. (A second ago)
He had lain on the peach. (In the past)
NEVER: He lays on the beach.

The dog lies at my feet. (Right now)
The dog lay at my feet. (A second ago)
The dog had lain at my feet (At some point in the past)
NEVER: The dog lays at my feet)

He lies on the couch. (Right now)
Come lie on the couch. OK?
Come lie down on the couch. OK?
He lay on the couch. (A second ago)
He had lain on the couch. (At some point in the past)

Give the job to whoever wants it most. (HE wants it most; thus 'whoever.')
We will hire whoever/whomever you recommend. (You recommend 'him,' not 'he'; thus 'whomever is correct.)

Thanks.