As he emerged, Boris remarked, glancing up at the clock: "You are early.
( ( As ( he emerged ) ) ( , ( ( ( ( ( Boris ( ( remarked , ) ( ( glancing up ) ( at ( the clock ) ) ) ) ) : ) `` ) ( You ( are early ) ) ) . ) ) )
(ROOT (S (SBAR (IN As) (S (NP (PRP he)) (VP (VBD emerged)))) (, ,) (S (NP (NNP Boris)) (VP (VBD remarked) (, ,) (S (VP (VBG glancing) (PRT (RP up)) (PP (IN at) (NP (DT the) (NN clock))))))) (: :) (`` ``) (S (NP (PRP You)) (VP (VBP are) (ADJP (JJ early)))) (. .)))
Boris had just arrived at the rendezvous when he appeared.
( Boris ( ( ( had just ) ( arrived ( at ( ( the rendezvous ) ( when ( he appeared ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Boris)) (VP (VBD had) (ADVP (RB just)) (VP (VBN arrived) (PP (IN at) (NP (NP (DT the) (NN rendezvous)) (SBAR (WHADVP (WRB when)) (S (NP (PRP he)) (VP (VBD appeared)))))))) (. .)))