If the cloth has tension before it is cut, then it will contract after it is cut into separate pattern pieces.
( ( If ( ( the cloth ) ( has ( tension ( before ( it ( is cut ) ) ) ) ) ) ) ( , ( then ( it ( ( will ( contract ( after ( it ( is ( cut ( into ( separate ( pattern pieces ) ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (DT the) (NN cloth)) (VP (VBZ has) (NP (NP (NN tension)) (SBAR (IN before) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN cut))))))))) (, ,) (ADVP (RB then)) (NP (PRP it)) (VP (MD will) (VP (VB contract) (SBAR (IN after) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN cut) (PP (IN into) (NP (JJ separate) (NN pattern) (NNS pieces))))))))) (. .)))
Fabric will shrink under the condition that it was stretched out during the cutting process.
( Fabric ( ( will ( ( shrink ( under ( the condition ) ) ) ( that ( it ( was ( ( stretched out ) ( during ( the ( cutting process ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Fabric)) (VP (MD will) (VP (VB shrink) (PP (IN under) (NP (DT the) (NN condition))) (SBAR (IN that) (S (NP (PRP it)) (VP (VBD was) (VP (VBN stretched) (PRT (RP out)) (PP (IN during) (NP (DT the) (VBG cutting) (NN process))))))))) (. .)))