**Here are some examples of using the word «mentally» in English:**
1. She was mentally preparing herself for the exam for weeks.
2. After the accident, he was mentally and physically exhausted.
3. The therapist helped him to deal with his mental health issues.
4. She mentally calculated the total cost of the project.
5. He was mentally prepared for the worst, but was pleasantly surprised by the outcome.
6. The teacher mentally reviewed the class schedule for the week.
7. She mentally went through all the steps of the recipe to make sure she didn't forget anything.
8. He mentally compared the prices of different cars to decide which one to buy.
9. The coach mentally prepared the team for the upcoming game.
10. She mentally visualized herself winning the competition.