verb
BAD : The tourists were laying in the hot sun like corpses.
GOOD : The tourists were lying in the hot sun like corpses.
BAD : We broke down the door and found him laying on the carpet.
GOOD : We broke down the door and found him lying on the carpet.
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lay ( laying, laid, laid ) = put something somewhere: 'She laid the money on the table in front of me.'
lie ( lying, lay, lain ) = be in a horizontal position (on the ground/on a bed etc): 'He was lying on his back, staring up at the sky.' 'I could lie here all day!'