Here's how to identify a main verb:
* Ask "What is the subject doing?" or "What is the subject being?" The answer will be the main verb.
Examples:
* The dog barked loudly. ("Barked" is the main verb, describing the dog's action.)
* The sky is blue. ("Is" is the main verb, describing the state of being of the sky.)
* She will sing at the concert. ("Will sing" is the main verb, describing the future action of "she".)
* They have been waiting for hours. ("Have been waiting" is the main verb, describing the action of "they" over a period of time.)
Key Points:
* Every sentence needs a main verb.
* The main verb can be one word or multiple words.
* It can be in different tenses (present, past, future, etc.).
* It can be active or passive.
Understanding main verbs is crucial for constructing grammatically correct and meaningful sentences.