forms of to be: am, are, is, was, were, will be, shall be, has been, have been, had been, could be, should be, would be, might have been, could have been, should have been, shall have been, will have been, must have been, must be
sensory verbs: look, sound, taste, smell, feel
words that express shades of meaning in reference to a state of being: appear, grow, remain, seem, stay, turn.