By or Until
.
When do we use BY?
We use by to set a time limit for completion:
- It must be ready by Friday.
- It can be ready before Friday, but Friday is the final day. (By is a preposition here.)
When do we use UNTIL?
We use until when the activity continues throughout the period up to the time limit:
- I'll be here until five o'clock.
- Between now and five o'clock, I shall be here all the time. (Untilcan be a preposition (until five o'clock) or a conjunction (until you have finished.) )
From: http://www.english-for-students.com/Use-of-By-1.html
موضوعات: دانشکده شمسی يور Shamsipour College, دانشکده انقلاب اسلامی ITTC, زبان انگلیسی کاردانی به کارشناسی, کنکور سراسری Governmental University Entrance, Book 4, گرامر زبان انگلیسی Grammar
