Write, write, and write.
( ( ( ( ( ( Write , ) write ) , ) and ) write ) . )
(ROOT (S (VP (VP (VB Write)) (, ,) (VP (VB write)) (, ,) (CC and) (VP (VB write))) (. .)))
Keep on writing.
( ( Keep ( on writing ) ) . )
(ROOT (S (VP (VB Keep) (PP (IN on) (NP (NN writing)))) (. .)))