Lie or Lay in present tense, help....

In the following few sentences, could anybody expalin how to use lie or lay. I think it is because i write in the present tense, not the past continuous.... maybe direct me to some rules.

Thank you so much.

1. Dead men lie here and there, brave souls he has known, as his path takes him further into the swamp.
2. Before him lies one of the blind warriors of Zahkih, his once beautiful face now a mass of bone and blood.
3. He wants to fall, he wants to lie down and let the hydra venom take him, but the words of the Prophecy rise in his twisted thoughts and give him the strength to continue his search.
4. Ho slices the rump of his decapitated son, who lies upon the salted kitchen table, twitching.
5. "No!" He lets out a feeble cry as Zahkih rises and pulls back the blankets so that he lies (lays) exposed to the chilly air.
6. A Victorian letter opener lies upon the bottom of its half-open drawer, and a QWERTY typewriter sits ready for use with a sheet of velum loaded within it.
7. At its heart I see a formidable warrior sitting upon his throne, beside which lies a wolf.
8. The answer again must somehow lie within the psyche of those who created Dragonland with their belief.
9. But then he had been dragged from his cell and whipped brutally, and the wounds had been so painful that he could not lie upon his back.