There is a lot of training to be done before you can run in a marathon.
He was late for the marathon.
I was making my marathon debut at the age of 40!
I collapsed before I could finish the marathon. A marathon is a footrace of a certain distance because of some Roman guy that ran all the way from the city of Marathon, to Rome, then died on the spot. Don't let your meals become a marathon.
He answered feebly. The last runner in the marathon arrived feebly.
No. It should be either "You have run a marathon" or "You ran a marathon".
the two grils went to get a refrehment at the lemonade stand,right after they ran a marathon
No, because it cannot stand alone as a sentence.
The intense training program culminated in a successful marathon finish for the athlete.
Although she appeared to be an elderly woman, she ran faster than any of us in the marathon.
As the marathon runners entered the homestretch, the crowd cheered them on to the finish line.
the cyclist came to the marathon
A marathon is a long race. But it is slower than a normal race.