In Modal verbs^x, helping verbs^x, Auxiliaries^x

You call them differently because they are different. Auxiliary verbs (also called Primary auxiliary verbs - to be, to have and to do) form tenses and show Aspect. They can also be lexical verbs and they can be inflected. Modal auxiliary verbs do not change form and they add modality to the...

I was a bit confused myself in the beginning becuase I thought that modals were just can, could; may, might; will, would; must; shall, should. These verbs are the "classical" modals, but every verb that expresses/describes the modus of a full verb is a modal verb: I may go e.g. means I...