She is nine years old.
She might/could be nine years old.
Play rugby
They must be playing rugby/ They can't be playing basketball
Send an email
He might/could be sending an email
Play the flute correctly
She might/could be playing the flute correctly
Be in a library
She must be in a library. She can't be in a cinema.
Buy something
She must be buying something
Walking in the park
They must be walking in the park
Be San Juan de Gaztelugatxe
It must be San Juan de Gaztelugatxe
Leave home
She might/could be leaving home
Brush her hair
She can't be brushing her hair
Work as a paparazzi
He might/could be working as a paparazzi
Work in the office
She might/could be working in the office
Play Brawl Stars
They migh/could be playing Browl Stars
Be hungry
She must be hungry
Eat tomato
He could/ might be eating tomato
Go to school
They might/could be going to school
Neat person
It can't be a neat person