( ( If ( ( your body ) ( is ( ( sending ( thirst signals ) ) then ) ) ) ) ( you ( ( are DEHYDRATED ) . ) ) )
(ROOT (S (SBAR (IN If) (S (NP (PRP$ your) (NN body)) (VP (VBZ is) (VP (VBG sending) (NP (NN thirst) (NNS signals)) (ADVP (RB then)))))) (NP (PRP you)) (VP (VBP are) (VP (VBN DEHYDRATED))) (. .)))
If your body is sending thirst signals then you are DEHYDRATED.
(ROOT (S (NP (NNS Hormones)) (VP (VBP send) (NP (NNS signals)) (PP (IN through) (NP (PRP$ your) (NN body)))) (. .)))