No. That is a noun. It may serve as the subject or an object in the example sentence you are looking at.
they were indians.
Buffalo
nothing
The Plains Indians were nomads. They were good hunters. Their main food was the American Buffalo.
Strumming is a main Verb
religion,social and nature
A helping verb can work with the main verb to tell about an action. The helping verb always comes before the main verb.
To believe is a main verb.
A helping verb can work with the main verb to tell about an action. The helping verb always comes before the main verb.
It's a main verb.
The main verb in that sentence is 'open'.
The verb 'believe' is a main verb, which may have an auxiliary verb. Examples: I believe that we've met before. (verb) You can believe what he tells you. (main verb with 'can' as the auxiliary verb)