Verb "to be" in Present Indefinite.

1) My mother is a designer. Now she is not at home. She is at work.
2) Where are my books? They are on the shelf.
3) Who is your father? - He is an officer.
4) Are you a doctor? - No, I'm a student.
5) Where are you now? - I'm at work.
6) Whose these things are? - These are my things. Whose things are these?
7) Is this your coat? - No, it isn't.

Verb "to be" in Present Indefinite.

1) My mother is a designer. Now she is not at home. She is at work.
2) Where are my books? They are on the shelf.
3) Who is your father? - He is an officer.
4) Are you a doctor? - No, I'm a student.
5) Where are you now? - I'm at work.
6) Whose are these things are? - These are my things.
7) Is this your coat? - No, it isn't.