～はずです
A result is expected from what you know
You'll be able to state a strong expectation based on facts, plans, or reasonable evidence.
父はもう家にいるはずです。
chichi wa mou ie ni iru hazu desu.
What do you think this sentence means?
My father should be at home by now.
Expect a result from a reason
～はずです expresses an expectation grounded in what the speaker knows. It means something should be the case, rather than that someone has a duty to do it.
この店は今日も開いているはずです。
kono mise wa kyou mo aite iru hazu desu.
This shop should be open today too.
Form and use ～はずです
Use a supporting reason such as a schedule or known fact. The expectation can turn out wrong. Obligation is expressed with other patterns, not this はず.
この店は今日も開いているはずです。
kono mise wa kyou mo aite iru hazu desu.
This shop should be open today too.
図書館は今、静かなはずです。
toshokan wa ima, shizuka na hazu desu.
The library should be quiet right now.
蓮はこの道を知っているはずです。
ren wa kono michi o shitte iru hazu desu.
Ren should know this road.
荷物は昨日送ったので、明日届くはずです。
nimotsu wa kinou okutta node, ashita todoku hazu desu.
I sent the package yesterday, so it should arrive tomorrow.
会議は三時に終わるはずですから、その後で電話します。
kaigi wa sanji ni owaru hazu desu kara, sono ato de denwa shimasu.
The meeting should end at three, so I'll call you after that.
田中さんは毎日練習していたから、今日の試合は大丈夫なはずです。
tanaka-san wa mainichi renshuu shite ita kara, kyou no shiai wa daijoubu na hazu desu.
Tanaka-san practiced every day, so today's match should go fine.
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