To use POS tagging in NLTK to filter verbs and nouns for text generation, you can tokenize text, tag each token with its part of speech, and then filter based on POS tags like NN, NNS (nouns) or VB, VBD, VBG (verbs). Here is the code snippet showing how it is done:

Hence, this will output a list of words that are either nouns or verbs based on their POS tags.
You can refer to the above for POS tagging in NLTK to filter verbs and nouns for text generation.