Kare wa ichijikan mae ni ie o deta kara, mōsugu tsuku hazu da.

He left home an hour ago, so he should arrive soon.

Dekakeru mae ni mado o shimeta hazu desu ga, shinpai ni natte kimashita.

I am sure I closed the window before going out, but I'm starting to worry.

Kono hon wa kantan dakara, shōgakusei demo yomeru hazu da.

This book is simple, so even elementary school students should be able to read it.

Kare ni wa kinō mēru o okutta kara, mō yonda hazu da.

I sent him an email yesterday, so he should have read it by now.

Kyūkō densha ni noreba, yakusoku no jikan ni maniau hazu desu.

If we take the express train, we should make it in time for the appointment.

Kagi wa tsukue no ue ni oita hazu nanoni, doko o sagashitemo mitsukarimasen.

I am sure I put the keys on the desk, but I can't find them no matter where I look.