Student or Learner
Are these sentences acceptable?
1. "I'm sure you are doing a job well done."
I think 'a job well done' is for something that has been done already.
2. "You did pretty good."
Thank you for your help.
I'm sure you're doing a good job.
I'm sure you're doing the job well.
The first is colloquial and common. The second would be unusual.