(V/Vないformない/い-い/な-な/Nの)はずです

Usage

This sentence is used when a speaker states a conclusion that he or she has reached on particular grounds

ミラーさん今日来るでしょうか。来るはずですよ。電話がありましたから。 Will Mr. Miller come today, I wonder? He's bound to come. He (said so when he) called yesterday.