He is reading a book at the moment
He reads in bed every night
My father is a doctor. He works in hospital
My brother is working hard because he has an exam tomorrow
Where is your mother? She is cooking in the kitchen
She always cooks delicious meals
My sister has two children
Where is Tom? He is having a shower
Switch off the television. The baby is sleeping
I sleep eight hours every day.
Правило простое. Если речь идет о данном конкретном моменте "сейчас", то употребляется Present Continuous. Если говорится о том, что происходит всегда, или каждую, например, субботу "постоянно", то употребляется Present Simple