PS: Take a look at these free English educational resources: Article: Prepare IELTS — How to Use Have — Canada Timeline — Ago
- Kenan198998February 2018
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Mohamad0018February 2018 By: not later than; at or before: She had promised to be back by five o'clock. The application must be in by the 31st to be accepted. By the time I got to the station the train had already gone. |
Mohamad0018February 2018 Or we can say "My certificate will expire by March!" |
Mohamad0018February 2018 I mostly think that "by March" is correct. Because if we want to mention a deadline, we should use "by". "Bye" |