This document provides examples and explanations of the present simple tense in English for affirmative, negative, and interrogative sentences. It demonstrates how to conjugate the verb "to be" in the present simple tense for the first, second, third person singular and plural. Examples are given for each person and type of sentence using subjects like "I, you, he, she, it, we, you, they." Short answers to sample questions are also illustrated.

1. PRESENT SIMPLE (Aff.)
To be
I am
You are
He / She / It is
We are
You are
They are

2. Examples
• I am a good student.
• You are my teacher.
• Pedro (he) is my friend.
• María (she) is my friend, too.
• The cat (it) is on the chair.
• Pedro, María and I (we) are friends.
• “You, boys and girls, are young students.”
• Pedro and María (they) are my friends.

3. PRESENT SIMPLE (Neg.)
To be
I am ’m not
You are aren’t
He / She / It is isn’t
not
We are aren’t
You are aren’t
They are aren’t

4. Examples
• I am not a good student.
I’m not a good student.
• You are not my teacher.
You aren’t my teacher.
• Pedro (he) is not my friend.
Pedro (he) isn’t my friend.
• María (she) is not my friend.
María (she) isn’t my friend.
• The cat (it) is not on the chair.
The cat (it) isn’t on the chair.
• Pedro, María and I (we) are not friends.
Pedro, María and I (we) aren’t friends.
• “You, boys and girls, are not young students.”
“You, boys and girls, aren’t young students.”
• Pedro and María (they) are not my friends.
Pedro and María (they) aren’t my friends.

5. PRESENT SIMPLE (Int.)
To be
I am
You are
He / She / It is
We are
You are
They are

6. PRESENT SIMPLE (Int.)
To be
Am I
Are you
Is he / she / it ?
Are we
Are you
Are they

7. Examples
• Am I a good student ?
• Are you my teacher ?
• Is Pedro (he) my friend ?
• Is María (she) my friend, too ?
• Is the cat (it) on the chair ?
• Are Pedro, María and I (we) friends ?
• Are you, boys and girls, young students ?
• Are Pedro and María (they) my friends ?

8. Short answers
• Am I a good student ?
Yes, you are /// No, you aren’t.
• Are you my teacher ?
Yes, I am. /// No, I’m not.
• Is Pedro my friend ?
Yes, he is. /// No, he isn’t.
• Is María my friend, too ?
Yes, she is. /// No, she isn’t.
• Is the cat on the chair ?
Yes, it is. /// No it isn’t.
• Are Pedro, María and I friends ?
Yes, we are. /// No, we aren’t.
• Are you, boys and girls, young students ?
Yes, we are. /// No, we aren’t.
• Are Pedro and María my friends ?
Yes, they are. /// No, they aren’t.