Underline infinitives or infinitive phrases; circle or highlight prepositional phrases. Please help!! Tell me which ones are which!!:)

1. We went to the store to buy some groceries.
2. My mother loves to sew clothes for her granddaughter to wear.
3. To speak eloquently is a gift.
4. I want to see the Eiffel Tower one day if I ever go to France.
5. He has the strength to carry on.
6. He gave his last dollar to a Salvation Army bell ringer.