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The inflection of verbs in present-day colloquial English has been described in many works—most clearly and exhaustively, perhaps, by Sweet, Palmer, Curme, Fries, Jespersen, and Hockett. In view of the number and fullness of these descriptions, no new treatment can hope to add any facts hitherto overlooked: at most, a new treatment may be able to arrange the known facts more systematically than has been done before, or in a way that will be more useful to other linguists.
Bernard Bloch (Mon,) studied this question.