Sure! Here are the completed sentences:

1. I have a bookshelf in my bedroom.
**There is a bookshelf in my bedroom.**

2. There is a sink, a fridge, a cooker, and a cupboard in our kitchen.
**We have a sink, a fridge, a cooker, and a cupboard in our kitchen.**

3. My favorite room in the house is the living room.
**I like the living room the most.**

4. The dog is in front of the microwave.
**The microwave is behind the dog.**

5. John has a brother, David.
**David is John's brother.**

6. My sister goes to the market every day on foot.
**My sister walks to the market every day.**

7. There is a beautiful piano in my sister's room.
**My sister's room has a beautiful piano.**

8. The woman is tall and thin.
**She's tall and thin.**

9. Their eyes are brown.
**They have brown eyes.**

10. The book is on the table.
**There is a book on the table.**