Sure, here are a few sentences describing what someone is doing in English:

1. Sarah is sitting at her desk, typing furiously on her laptop as she tries to meet her project deadline.
2. John is jogging through the park, listening to music on his headphones and enjoying the fresh morning air.
3. Emily is in the kitchen, carefully chopping vegetables for the dinner she plans to cook for her family.
4. Michael is painting a landscape on a large canvas, his brush strokes precise and deliberate.
5. Lisa is reading a book on the couch, completely absorbed in the story and oblivious to everything around her.
6. David is fixing his bicycle in the garage, tightening the bolts and adjusting the brakes.
7. Anna is watering the plants in her garden, making sure each one gets enough moisture.
8. Tom is playing the guitar on his balcony, strumming chords and singing softly to himself.
9. Rachel is organizing her closet, folding clothes neatly and arranging them by color.
10. Kevin is playing a video game in the living room, his eyes focused on the screen and his fingers moving rapidly on the controller.