The person are writing with chalk.
The person is writing with chalk.
He are looking at the clock.
He is looking at the clock.
The teacher is siting at the desk.
The teacher is sitting at the desk.
You am dancing now.
You are dancing now.
He is writes on a blackboard.
He is writing on a blackboard.
I are sitting on a chair.
I am sitting on a chair.
The man are opening the door.
The man is opening the door.
They are eat dinner.
They are eating dinner.
We singing at the moment.
We are singing at the moment.
She reading a book.
She is reading a book.