Meaning of be in English
US /bi/ UK /biː/
1. a word used to describe someone or something or give more information about them
She is my girlfriend.
2. a word used to show that something exists
The cat is in the park.
3. a word used to show that someone is present
I will be at home tonight.
4. a word used to have a particular quality, nature, role etc.
I'm happy.
I want to be a doctor.
6. a word used to help make other verbs
"What are you doing?" "I am reading."
7. a word used instead of ‘go’ in questions and in negative sentences
Have you been to London?