〜はずだ hazu da
〜はずだ（hazu da）means “should be; is supposed to (logical expectation)”. Expresses the speaker's logical, well-grounded expectation: based on what you know, something should be the case. Formation: V普通形 / イA普通形 / ナA（〜な・〜である）/ N（〜の・〜である）＋ はずだ
should be; is supposed to (logical expectation)
N4Formation
V普通形 / イA普通形 / ナA（〜な・〜である）/ N（〜の・〜である）＋ はずだ
Explanation
Expresses the speaker's logical, well-grounded expectation: based on what you know, something should be the case. It is a reasoned conclusion, not a wish or hope.
Examples
Note
Negative: 〜ないはずだ (shouldn't be). 〜はずがない means 'there's no way it could be'. Don't confuse with 〜べきだ (should, as obligation).
FAQ
〜はずだ — what does it mean and how is it used?
should be; is supposed to (logical expectation). Expresses the speaker's logical, well-grounded expectation: based on what you know, something should be the case. It is a reasoned conclusion, not a wish or hope.
〜はずだ — how do you form it?
V普通形 / イA普通形 / ナA（〜な・〜である）/ N（〜の・〜である）＋ はずだ
〜はずだ — any usage notes?
Negative: 〜ないはずだ (shouldn't be). 〜はずがない means 'there's no way it could be'. Don't confuse with 〜べきだ (should, as obligation).