**Here are some examples of using the word «pledge» in English:**
1. The new law requires all citizens to pledge their loyalty to the country.
2. As a way to support the environment, I have pledged to reduce my use of plastic.
3. The company made a public pledge to improve working conditions in its factories.
4. Before starting the program, participants are required to sign a pledge promising to follow the rules.
5. The charity organization is asking for donations to help children in need. Donors can pledge any amount they wish.
6. The politician made a pledge to reduce taxes for small businesses.
7. The team captain pledged to win the championship and encouraged his teammates to do their best.
8. The organization's members pledged to work together to achieve their goals.
9. The parents pledged to support their child's education by paying for tuition fees.
10. The witness pledged to tell the truth in court.
In each of these examples, the word «pledge» is used to describe a solemn promise or commitment to do something.