Most of us are familiar with the concept of
being burned out. It’s that feeling you get when you’re stressed, overwhelmed,
and simply don’t have any more energy to devote to a given task, activity, … or
career.
Remember that British and American English have different rules for the use of the present perfect. The comments and the exercises here refer to correct grammar for British English. In American English, it is often considered acceptable to use the past simple in some of these examples.