1. There’s a car ahead of Sergey’s car, but it isn’t moving. (ahead of = in front of) | 
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2. It’s a good idea to get your work finished ahead of time. (ahead of = before) | 
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3. His ideas about science and technology are ahead of everyone else’s. | |
4. Brian is thinking about the week of vacation that he has ahead of him. | |
5. The home team is ahead of the visiting team by two points. | |
6. Marcia and her coworkers are trying to stay ahead of the competition. | |
7. Victor wants to stay ahead of the other students, so he works very hard on his school work. | |