**Although** is a conjunction that is used to introduce a contrast or concession in a sentence. Here are some examples of its usage:
1. **Although** it was raining hard, we decided to go for a walk.
2. **Although** she was nervous, she gave a great presentation in front of the audience.
3. **Although** I like chocolate, I cannot eat it because of my diet.
4. **Although** he studied hard, he still failed the exam.
5. **Although** the movie was not very good, we enjoyed it because of the great acting.
6. **Although** they were tired after the long day, they decided to go to the gym.
7. **Although** it was expensive, we decided to buy the tickets for the concert.
8. **Although** she had a lot of work to do, she volunteered to help with the charity event.
9. **Although** we were running late, we managed to catch the train.
10. **Although** he was not a professional singer, he sang beautifully at the karaoke.
In each of these examples, **although** is used to introduce a clause that contrasts with the main clause, highlighting a surprising or unexpected result.