1. We use the present continuous tense to talk about the present:
• for something that is happening at the moment of speaking:
I’m just leaving work. I’ll be home in an hour.
Please be quiet. The children are sleeping.
• for something which is happening before and after a given time:
At eight o’clock we are usually having breakfast.
When I get home the children are doing their homework.
• for something which we think is temporary:
Michael is at university. He’s studying history.
I’m working in London for the next two weeks.
• for something which is new and contrasts with a previous state:
These days most people are using email instead of writing letters.
What sort of clothes are teenagers wearing nowadays? What sort of music are they listening to?
• to show that something is changing, growing or developing:
The children are growing quickly.
The climate is changing rapidly.
Your English is improving.