One and only one time.
The word "once" is correct and usable in written English. It can be used in various ways, such as to mean "at one time," "on one occasion," "immediately," or "as soon as." For example: Once the sun sets, we should get moving.
Once bitten, twice shy".
One former Alton Towers employee explained that the Smiler could have up to five cars moving around the track at once and a "block system" run by sensors prevented two cars entering specific sections at the same time.
"I was amazed to find that I slept that night without waking up once, and I can't remember the last time that happened.
Teddy Roosevelt once observed that life's greatest gift is the opportunity to work hard at work worth doing.
Once again it shows how voluntary action can show the way, proving that a low-carbon future is an essential, achievable and urgent priority.
Once all polling stations have closed this restriction will be lifted.
But once banks get a customer he's pretty much theirs for good.
In the days that I followed Jones around, I heard several people who ran training programs in green professions complain that once their students had graduated they couldn't find work.
My look was described as "All Saints mum" once.
I once joined a shopping trip in pursuit of some of this stuff.
He noted "that once hollowed-out city centres are thriving again, with growing universities, iconic museums and cultural events, and with huge improvements to the quality of life".
I love the desktop app, it’s always running on my Mac. Ludwig is the best English buddy, it answers my 100 queries per day and stays cool.
Cristina Valenza
Retail Lead Linguist @ Apple Inc.