1. She can not work hard because she is very old
because of being very old, She cannot work hard
2. He likes her because she is very beautiful
because of her beauty, he likes her
3. He couldn't go to school because he was very poor
because of being very poor, He couldn't go to school
4. I can't buy this bike because I don't have enough money
because of not having enough money, I can't buy this bike
5. He broke the vase because he was careless
because of being careless, He broke the vase
6. He failed the exam because he didn't learn the lessons carefully
because of not learning the lessons carefully, he failed the exam
7. We can't go for a walk because it rains heavily
because of heavy rain, We can't go for a walk
8. He left school because his life was hard
because of the hard life, he left school
9. She was very happy because she was given a new bike
because of being given a new bike, she was very happy
10. I went to bad early because I felt tired
because of feeling tired, I went to bed early