～はずだ (〜hazu da)
Explanation
Expresses an expectation, 'should' or 'it is supposed to'.
Formation
Verb-casual + はずだ, い-Adjective + はずだ, な-Adjective + なはずだ, Noun + のはずだ
Detailed Explanation
The ～はずだ grammar point is used to express an expectation or belief that something is true, even if it has not been confirmed. It can be translated as 'should', 'it is supposed to', or 'ought to' in English. The formation differs depending on whether it is used with a verb, い-adjective, な-adjective, or noun.
Examples
彼はもう着いたはずだ。
Kare wa mou tsuita hazu da.
He should have arrived by now.
この薬を飲むと、痛みがなくなるはずだ。
Kono kusuri wo nomu to, itami ga nakunaru hazu da.
If you take this medicine, the pain should go away.
明日は晴れるはずだ。
Ashita wa hareru hazu da.
It is supposed to be sunny tomorrow.
彼女は元気なはずだ。
Kanojo wa genki na hazu da.
She is supposed to be well.
Grammar content sourced from hanabira.org.