"Have you done a try-out before presentation?", is it correct?
Do you mean practicing giving a presentation?
Then use "practice" or "dry run."
A "try out" is an audition.
And you need to say "before the presentation" if you are speaking of a particular one, or "a presentation" is talking in general.
Understandable but not usual in AmE. First, you need and article, "a/the" preceding "presentation". And if by "try-out" you mean competition among others, you would most likely hear "Have you tried out etc." Otherwise, if you are referring to a practice presentation, then "dry run" would be an appropriate term.
Originally Posted by soviphou
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