Set a timer for four hours, you have hours. When you get under an hour left you have minutes; the hours have become minutes. When you get under a minute you have seconds left; the minutes have become seconds.
So when you're talking to someone of time running out you can say "remember, the minutes become seconds".
The metaphor is the best way to explain or enhance all these explanations. When waiting for her to arrive, and i'm excited, the first few minutes are fine but then i get more excited and the minutes become so long and full of anticipation they're like hours, and eventually the seconds become like minutes to me. I secondi deventano minuti... It's also poetic. See the movie Il Postino..."è un metaforo..." great for an Italian lessson, great for a date night.
The minutes become seconds......at first I thought logically....that is not the case here......minutes do not technically become seconds. However, as aykut123 said, "You will understand when you fall in love." The hypothetical......the time passes quickly....where does the time go?
Everyone has a very timely response here! This discussion is very time-consuming. I bet you're getting ticked off for all these corny puns! Once I was delivering; carrying a box of wristwatches. Unfortunately, I was an hour late, stepped on a banana peel and slipped, which broke them all. You could say I was not watching my steps properly and literally broke time.
This might be considered idiomatic. . . Time flies by. If you are with the love of your life, the time spent together flies by. The minutes become seconds.
On the other hand, when you are in your calculus I class, the minutes become hours. . . the class never seems to end.