The one in this sentence refers to a quantity as in the number one and the once refers to the fact that this quantity only happened one time. Example: I only drank one beer, once in my life. If you said I only drank once in my life it would not quantify the number of beers you drank.
once mean one (past tence of once one)
once around the sun is one revolution, which is one year.
Yes; take 400mg all at once.
Happening one time and since the word once is almost like one. One and once almost have the same meaning that will also help you.
It means you pay only once and thats it
Assuming you mean what I think you mean, usually one, same as humans.
George was once a king but no one knows of what but very famous
It means you pay only once and thats it
It means you pay only once and thats it
You mean that WORLD was just one continent?
It means "one more time" or "once more."
Need site to answer. If you mean here, you can once you become one.