How to Use at One Time in English

Luke asks Yaron a question about the phrase, At the Time. He says there are major problems that the world needs to deal with without getting too much into politics. Luke's English podcast should be the place to debate about it, not in this episode. Use At One Time when you haven't mentioned the past period at all. That's when you use At One Time. But at the time, here, you're using The and this refers to something that's already been stated.