Helping Verbs:
* Function: They assist the main verb in expressing tense, mood, and voice. They don't have meaning on their own.
* Examples: *is*, *are*, *was*, *were*, *will*, *have*, *has*, *had*, *can*, *could*, *may*, *might*, *must*, *should*, *would*
* Sentence Example: "She will be going to the store." (will helps the main verb "be going" to indicate future tense)
Nouns:
* Function: They name people, places, things, or ideas. They can be the subject of a sentence, the object of a verb, or the object of a preposition.
* Examples: *dog*, *house*, *love*, *freedom*, *John*, *America*
* Sentence Example: "The dog chased the ball." (dog and ball are both nouns acting as subject and object respectively)
Key Differences:
* Meaning: Helping verbs don't have their own meaning, while nouns do.
* Function: Helping verbs modify verbs, while nouns function as names.
* Placement: Helping verbs come before the main verb, while nouns can occupy various positions in a sentence.
In summary, helping verbs and nouns are distinct grammatical elements with unique roles in a sentence.