English for Today
PRIMARY AUXILIARY VERBS
There are just three primary auxiliaries: BE, DO and HAVE. These three have various conjugational forms:
BE: am, is, are, was, were, be, being, been.
DO- do, does, did, done, doing
HAVE- have, has, had, having
Importantly, when using 'been' and 'being', it should be noted that the HAVE family goes with 'been' to show the perfective aspect while the BE family goes with 'being' to mark the progressive aspect. Examples:
She has been here(present perfect)
She is being here for a while(present continuous)