In the English language, As you may already know, the auxiliary verb "do" is used in the Present Simple Tense only in the interrogative (questions) and negative but not in the positive.

Hi Ajarn Ken,

What are the helping verbs and how are they used in English? Can you explain this clearly to me?

Thanks!! 

Mimi from Phillipines

This is a very common question and I can totally understand why the verb 'to be' can confuse a lot of English learners. The verb 'to be' we can use in a few different situations. Let's go through each one.