「Vdic+hazu da はずだ」
”I expect that-,””It is expected that-"
The verb hazu da is used to express the expectation the speaker has that something will take place, or took place. Hazu is a pseudo noun commonly followed by a copula.
Kono kisoku wa kawaru hazu da.
It is expected that this regulation will change.
Kono machi no jinkō wa fueru hazu desu.
The population of this town is expected to increase.
Ano ken wa Ono-san ga chōsa suru hazu deshita.
As for that matter, we expected that Mr. Ono would investigate it.
( •˓◞•̀ ) こゆうきあいはら ( •˓◞•̀ )