Which of the following is right grammatically? And why?
Would you be surprised if I had arrived yesterday without letting you know beforehand?
Would you have been surprised if I had arrived yesterday without letting you know beforehand?
If both are right , is there differences between them?
Boh are "grammatical" but they mean different things:
A 'would' question followed by 'be' (e.g. would you be surprised...) asks about a possible future situation: would you be surprised (if you learned, having previously been unaware) [that] I had arrived yesterday without letting you know beforehand?
A 'would' question followed by 'have been' (e.g. would you have been surprised...) asks about an unreal past situation (one that didn't happen): would you have been surprised (at the time) if I had arrived yesterday without letting you know beforehand?
