I/PRP is/VBZ a/DT girl/NN ./.

(ROOT
  (S
    (NP (PRP I))
    (VP (VBZ is)
      (NP (DT a) (NN girl)))
    (. .)))

nsubj(girl-4, I-1)
cop(girl-4, is-2)
det(girl-4, a-3)

I/PRP am/VBP a/DT girl/NN ./.

(ROOT
  (S
    (NP (PRP I))
    (VP (VBP am)
      (NP (DT a) (NN girl)))
    (. .)))

nsubj(girl-4, I-1)
cop(girl-4, am-2)
det(girl-4, a-3)

Ram/NNP reading/VBG ./.

(ROOT
  (NP
    (NP (NNP Ram))
    (VP (VBG reading))
    (. .)))

partmod(Ram-1, reading-2)

I/PRP is/VBZ was/VBD a/DT girl/NN ./.

(ROOT
  (S
    (NP (PRP I))
    (VP (VBZ is)
      (SQ (VBD was)
        (NP (DT a) (NN girl))))
    (. .)))

nsubj(is-2, I-1)
cop(girl-5, was-3)
det(girl-5, a-4)
dep(is-2, girl-5)

I/PRP have/VBP been/VBN a/DT girl/NN ./.

(ROOT
  (S
    (NP (PRP I))
    (VP (VBP have)
      (VP (VBN been)
        (NP (DT a) (NN girl))))
    (. .)))

nsubj(been-3, I-1)
aux(been-3, have-2)
det(girl-5, a-4)
dobj(been-3, girl-5)

I/PRP was/VBD being/VBG girl/VBN ./.

(ROOT
  (S
    (NP (PRP I))
    (VP (VBD was)
      (VP (VBG being)
        (VP (VBN girl))))
    (. .)))

nsubjpass(girl-4, I-1)
aux(girl-4, was-2)
auxpass(girl-4, being-3)

I/PRP was/VBD be/VB girl/NN ./.

(ROOT
  (S
    (NP (PRP I))
    (VP (VBD was)
      (VP (VB be)
        (NP (NN girl))))
    (. .)))

nsubj(girl-4, I-1)
aux(girl-4, was-2)
cop(girl-4, be-3)