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
Kare wa mou tsuita hazu da.
He should have arrived by now.
Kono kusuri wo nomu to, itami ga nakunaru hazu da.
If you take this medicine, the pain should go away.
Ashita wa hareru hazu da.
It is supposed to be sunny tomorrow.
Kanojo wa genki na hazu da.
She is supposed to be well.
Practice
Grammar content sourced from hanabira.org.