Domande riguardo a frasi esempio con, spiegazione d'utilizzo di "Shodent"s

A: I'm assuming you mean the words "shouldn't" and "couldn't".

Example of shouldn't: "He shouldn't be here". This means that it would be better if he wasn't there or that he is not allowed to be there.

Example of couldn't: "He couldn't be here". This means that he physically cannot be there (because he is busy, for example).

Both have very different meanings!