In grammar, we use TENSES to communicate; a TENSE is the from in which we express the TIME CONTEXT we are talking about. When we want to conjugate the verbs in the simple present tense, we need to ad an -S, an -ES or an -IES at the end of the verbs, but we need to be mindful of when to do it.
Verbs, part 1
In every language there are these wonderful words we call “verbs”. Verbs are one of the nine parts of speech that exist in the English Language, and one of the four major word classes.
Verb to be
The verb TO BE, as an auxiliary, can help us place the focus on the subject, giving the sentence a grammatical structure that we can use to convey a meaning. This particular verb can help us answer this questions: what something is? Who someone is? How something/someone is?