Primary Helping Verbs:
* Be: am, is, are, was, were, being, been
* Have: has, have, had, having
* Do: do, does, did
Modal Helping Verbs:
* Can: could
* May: might
* Will: would, shall, should
* Must
These helping verbs work alongside main verbs to create different verb tenses, moods, and voices. They help express ideas like:
* Tense: Present perfect (have/has + past participle), past progressive (was/were + present participle)
* Mood: Possibility (may), obligation (must), ability (can)
* Voice: Passive voice (be + past participle)
Remember, the helping verb always comes *before* the main verb in a verb phrase.