1. Please tell me where I should have been and where I shouldn't.
2. Please tell me where I should have been and where I shouldn't have.
3. Please tell me where I should have been and where I shouldn't have been.
Thank you.
#1 and #3 are OK. #2 is not. 5.
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#1 and #3 are OK.
#2 is not.
5. Please tell me where I should and shouldn't have been. <<< I prefer this.
Clive