Hi,
I saw the following sentence and was wondering why "didn't work" is incorrect if it replaces "can't have worked":
She got a terrible mark in the exam so she can't have worked very hard at all.
I'd appreciate your help.
I saw the following sentence and was wondering why "didn't work" is incorrect if it replaces "can't have worked":
She got a terrible mark in the exam so she can't have worked very hard at all.
I'd appreciate your help.
Last edited: