English The Verb "to be"
Overview

The Verb to be is one of the most used verbs in the English language. It has different forms. Below are the positive and negative conjugations of the verb “to be” in the present simple tense.
Positive
I’m 25 years old.
My brother is 22 years old.
Bob and I are neighbors.
Hello, my name is Mary.
My keys are in my bag.
You’re late for work.
It’s 9 am.
We’re happy.
Negative
Tom isn’t a teacher. He’s a lawyer.
Mary isn’t a student. She’s a nurse.
Tom and Mary aren’t teachers.
It isn’t cool today, it’s hot.
They aren’t Canadian. They are American.
We aren’t happy. We are sad.
I’m not Italian. I’m Spanish.
You aren’t early. You are late.
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Additional Topics

This unit covers subordinating conjunctions, including after, although, because, before, if, and since. These occur at the beginning of subordinate or dependent clauses, and are used to combine independent and dependent clauses together.
Common European Framework of Reference for Languages
The CEFR is an international standard used to describe language ability. Here are specific details of the CEFR for this topic.