Convert word into specific Part Of Speech (POS) format?

Convert word into specific Part Of Speech (POS) format?

Given a word, is it possible, using NLTK, to convert that word into a
specific Part Of Speech (POS) form? For example, given the word "run", can
I ask NLTK to convert it to any of the following:
VBZ: runs, as in "George runs to the store."
VBD: ran, as in "George ran to the store."
VB: run, as in "George wants to run."
Etc. If yes, same for nouns? e.g.:
NN: run, as in "George wants to run."
NNS: runs, as in "George went for two runs."
NNP: Run, as in "George had dinner at Run."