Question

were to use helping verbs in english grammer

Answer 1

Helping verbs are verbs that help the main verb in a sentence by extending its meaning. They can also add detail to how time is conveyed in a sentence. As a result, helping verbs are used to create the most complicated verb tenses in English: the progressive and the perfect aspects. These verbs also function to convey complicated shades of meaning like expectation, permission, probability, potential, obligation, and direction.

Answer 2

Helping verbs or auxiliary verbs such as will, shall, may, might, can, could, must, ought to, should, would, used to, need are used in conjunction with main verbs to express shades of time and mood.  An example of the use of a primary helping verb is the verb “is” in the sentence “She is watching a movie.” In this sentence, “is” helps the main verb “watching”. 


An auxiliary verb (or a helping verb as it's also called) accompanies a main verb to help express its tense, mood, or voice. 

The most common helping verb are:
Be: am, is, are, was, were, being, been
Do: does, do, did
Have: has, have, had, having.