Present Simple Be Versus Do in Questions

1. The Verb “Be” (am / is / are)

Rule:

“Be” does not need an auxiliary verb.

👍🏼

1. I am happy.
2. She is tired.

❓

1. Are you happy?
2. Is he at home?

🙅🏽‍♀️

1. I am not happy.
2. They are not ready.

Do you are happy? → incorrect

Are you happy? → correct

2. The Verb “Do” (for actions)

Rule:

Use “do / does” as an auxiliary verb in questions and negatives with action verbs.

👍🏼

1. I like it.
2. She plays football.

❓

1. Do you like it?
2. Does she play football?

🙅🏽‍♀️

1. I do not like it.
2. He does not work.

Like you it? → incorrect

Do you like it? → correct

3. Key Difference

Use “be” when it is the main verb. Do not use “do” in this case.

Use “do” when the main verb is an action verb.

Examples:

Are you tired?

Do you work here?