hazu desu はずです

Phrase meaning: be supposed/expected to (do), be sure to (do), ought to (do)

1. After dictionary form of verb/adjective
彼はもうはずです
Kare wa mou tsuku hazu desu.
He is supposed to arrive here soon.
このカメラはもっと安いはずです
Kono kamera wa motto yasui hazu desu.
This camera ought to be much cheaper.

2. After ta-form of verb/adjective
そう言ったはずです
Sou itta hazu da.
I'm sure I told you that.

3. After (adjectival) noun + na/no
ここは安全なはずです
Koko wa anzenna hazu desu.
This place ought to be safe.
彼女は病気のはずです
Kanojo wa byouki no hazu desu.
I'm sure she is sick.

4. After nai-form of verb/adjective
彼女はそんなことをしないはずです
Kanojo wa sonna koto o shinai hazu desu.
I don't expect that she is going to do such a thing.
-> See also: hazu ga nai