Combine these sentences using an infinitive

• I can swim . I learnt it when I was very young.
• Hansa will be home by ten o'clock. That is certain
• Leena did not have any extra money. She couldn't donate anything to the cause.
• Yani went shopping with her mother. She wanted a pair of shoes.
• This is difficult problem. Only a clever person can solve it. 
• The police have called Narain to te police station. They want his help with a case.

I can swim .I learnt it when I was very young. • I learnt to swim when I was very young. Hansa will be home by 10 o'clock. That is certain. • Hands will be home by 10 o'clock that is to certain. Leena did not have any extra money. She couldn't donate anything to the cause. • Leena did not have any extra money to donate to the cause. Vani went shopping with her mother. She wanted a pair of shoes. •Vani went shopping with her mother to buy a pair of shoes. This is a difficult problem. Only a clever person can solve it. • This is a difficult problem to solve it.