1. We don't take a trip to space because we don't have enough money. ( using conditional sentence)
-> If we have enough money, we will take a trip.
2. That woman is very beautiful. She is wearing a blue dress. ( using relative clause )
-> That woman whp is wearing a blue dress, is very beautiful.
3. Mary doesn't go to school because she is sick (If)
-> If Mary weren't sick, she would go to school.
4. I wanted the painting .you bought it ( using relative clause)
-> I wanted the painting which you bought.
5. He didn't have any money, but he bought an expensive mobile phone ( using although)
-> Although he didn't have any money, he bought an expensive mobile phone.
6. She grew a lot of trees in the garden 2 years ago. Their leavers were very nice ( whose)
-> She grew a lot of trees whose leavers were very nice in the garden 2 years ago.