( However ( , ( tornadoes ( ( can ( form ( ( any time ) ( of ( the year ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB However)) (, ,) (NP (NNS tornadoes)) (VP (MD can) (VP (VB form) (NP (NP (DT any) (NN time)) (PP (IN of) (NP (DT the) (NN year)))))) (. .)))
However, tornadoes can form any time of the year.
(ROOT (S (NP (NNS Tornadoes)) (VP (MD can) (VP (VB occur) (PP (IN in) (NP (DT any))))) (. .)))