Although the formal reconstruction of the PIE morphemic inventory seems to be rather complete, the evaluation of the original grammatical meanings associated with the reconstructed morphological segments remains a matter of on-going dispute regarding the ancient daughter languages as well as the reconstructed PIE forms. In the present paper, I aim to highlight some issues related to the reconstruction of the lexical aspectual features, paradigmatic and derivational patterns of PIE verbal stems, and grammatical value of affixes that constitute these stems.