Hazu
“At the bottom of every one of your fears is simply the fear that you can’t handle whatever life may bring you.” - Susan Jeffers
First, before you start learning how (grammatically) to use はず, you’re going to learn when it’s used. It’s a little bit tricky. To sum it up nice and simply, though, it expresses your expectation for something. Now, it’s not “expectation” as in looking forward to something. It’s expectation based off of some information. You’re expecting something to be / happen because you know something already (you’re tricky like that).
For example, you might say:
“I expect he went to Tokyo”
Perhaps he told you he was going to Tokyo. Maybe you knew from something you read. You aren’t just throwing out a guess, you know a little bit already. Another example:
“It’s expected that he’s a teacher.”
Once again, you know a little bit of info. Maybe he was your friends teacher, or something. Important thing to know is that you aren’t just making stuff up or guessing when you use はず.
So, if you learn anything from this page, learn this: はず = expectation. Expectation in things being done (verbs), expectation in the status of things (adjectives), and expectation in what things are (nouns). We’ll go into deeper detail with all three of these things on the next page, where you’ll learn the rules for each!