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== difference between auxiliary verb and modal verb ==
== difference between auxiliary verb and modal verb ==


* auxiliary verbs = "helper verbs"
** i.e., they assist or "help" another verb in order to indicate that verb's tense, voice or mood
*** I am going tomorrow
**** "am" = auxiliary verb to indicate present continuous tense of "to go" (going)
*** Joanna had thought about it
**** "had" = auxiliary verb to indicate past perfect tense of "to think" (thought)
* modal verbs = indicate "modality", or possibility, ability, permission, duty, correctness or obligation
** I can go tomorrow
*** "can" = modal verb to indicate possibility of the infinitive "to go" (go)
** Joanna should think about it
*** "should" = modal verb to indicate correctness of the infinitive verb "to think" (think)
*note that
**auxiliary verbs change according to inflection (conjugation)
***''I am going''
***''you are going''
**modal verbs do not change according to inflection (conjugation)
***''I should go''
***''You should go''
* see: https://pediaa.com/difference-between-modal-and-auxiliary-verbs
* see: https://pediaa.com/difference-between-modal-and-auxiliary-verbs