さすが（に） (sasuga-ni): As expected; even so at this point
～さすが（に） (sasuga-ni)
Meaning
As expected; even so at this point
Formation and usage
さすがに + clause
Notation: N = noun; V dictionary = dictionary-form verb; V stem = the stem before ます; plain clause = plain-form clause; negative stem = the form before ない. Follow the attachment shown above.
Explanation
Can praise someone as living up to expectations or acknowledge that a limit has finally been reached.
Examples
三時間も会議が続くと、さすがに疲れる。
When the meeting lasts three hours, even I get tired.
三時間も試験が続くと、さすがに疲れる。
When the exam lasts three hours, even I get tired.
三時間も研修が続くと、さすがに疲れる。
When the training session lasts three hours, even I get tired.
三時間も発表会が続くと、さすがに疲れる。
When the presentation event lasts three hours, even I get tired.
三時間も面接が続くと、さすがに疲れる。
When the interview lasts three hours, even I get tired.
How related patterns differ
さらに adds or increases; 何といっても singles out the strongest feature, while 何しろ gives a salient reason. さすがに can meet expectations or acknowledge a limit. いったい intensifies a question, 万一 anticipates a risk, and たちまち marks rapid change.