I have not noticed this construct until now. All what I was taught in ELL books was related to the moment now but not as a verb in the simple present form.
I understand that "until" seems to be used as follows:
present perfect + until + present simple
I have given some examples of this below. My questions are:
- is my understanding of this construction correct?
- is this a common construction? Does it apply to other words besides "until"?
In recent years, Metro officials have been conservative in improving bus services. For example, before scheduling evening bus runs, they have waited until demand surges for the latest bus on that route.
Title: Ambitious Metro plan seeks to ride new wave; Project targets once and future passengers. Author: JAMES ROBINSON; Staff. Source: Houston Chronicle
Influenced by Iris Murdoch's claim that choices are what you do when everything else has been lost, I became increasingly convinced that what we do is not what destroys us. Rather, our fate rests on how we describe what we do. Indeed, we do not know what we have done until we get the descriptions right.
Title: Learning from others. Author: Stanley Hauerwas. Source: Christian Century
Film, meanwhile, is single-use. You make a permanent image on the film once you expose it. If you want to take more pictures, you carry more film. And you don't know for sure what you have shot until after the film is processed. With digital cameras, images can be displayed on a tiny screen. Don't like one? Erase it and shoot again.
Title: Picture perfect. Author: Jay Dickman. Source: Boys Life