Correct: am, is, are, was, were, being, been, be, has, had, have, do, does, did, shall, will, should, would, may, might, must, can, could, Incorrect: walk, jump, wondering, fishing, telling, catch, caught, seen, watch, gone, looking, find, sailing, kept, listening, believing, pulling, run, swim, winning, playing, hopping, dream,

Helping Verbs

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