A word that denotes action or motion is called a Verb
. Whenever we add ed
to the end of a verb to indicate past tense, we call them Regular
or Weak Verbs
, such as worked, talked, strolled, lifted.
Verbs that undergo an internal change in order to indicate past tense are called Irregular
or Strong Verbs
, such as bought, broke, grew. Auxiliary Verbs
helping verbs, that is, they assist in making a verb phrase indicate definite time. The auxiliaries are: be, am, are, is, was, were, shall, should, will, would, may, must, can, could, have, had, has, been.