( It ( ( ( ( ( ( is also ) ( possible ( for ( ( two atoms ) share ) ) ) ) ( ( ( more ( than one ) ) pair ) ( of electrons ) ) ) , ) ( ( ( ( sharing ( two ( pairs results ) ) ) ( in ( a ( double bond ) ) ) ) and ) ( ( sharing ( three ( pairs results ) ) ) ( in ( a ( triple bond ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (ADVP (RB also)) (ADJP (JJ possible) (PP (IN for) (NP (NP (CD two) (NNS atoms)) (NP (NN share)))))) (NP (NP (QP (JJR more) (IN than) (CD one)) (NN pair)) (PP (IN of) (NP (NNS electrons)))) (, ,) (S (VP (VP (VBG sharing) (NP (CD two) (NNS pairs) (NNS results)) (PP (IN in) (NP (DT a) (JJ double) (NN bond)))) (CC and) (VP (VBG sharing) (NP (CD three) (NNS pairs) (NNS results)) (PP (IN in) (NP (DT a) (JJ triple) (NN bond)))))) (. .)))
It is also possible for two atoms share more than one pair of electrons, sharing two pairs results in a double bond and sharing three pairs results in a triple bond.
(ROOT (S (PP (IN In) (NP (DT a) (NN carbon) (JJ triple) (NN bond))) (, ,) (NP (NP (CD three) (NNS pairs)) (PP (IN of) (NP (NNS electrons)))) (VP (VBP are) (VP (VBN shared))) (. .)))