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What's the difference between 'By' and 'Until'?
The use of those two words is always confusing to me because they are translated into the same word in my native language.
"Can I stay here by tomorrow?"
"Can I stay here until tomorrow?"
"I need your report by next Tuesday."
"I need your report until next Tuesday."
Are they all grammatically correct?
Can you clearly explain when I should use 'by' and when I should use 'until'?
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"Can I stay here by tomorrow?" (wrong)
"Can I stay here until tomorrow?" (correct)
"I need your report by next Tuesday." (correct)
"I need your report until next Tuesday." (wrong)
by implies something that needs to be completed *before* a specific point in time.
until implies all the time that passes before a specific point in time in which something needs to happen.
I am sure there are better explanations.
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Sorry, the second one isn't completely wrong, but it has a totally different meaning.
"I need your report until next Tuesday." would imply that the person making the statement needs the report now and will return it next Tuesday.
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