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~hazu Datta: Was Supposed To

Learn hazu datta for "was supposed to happen but didn't" — expressing disappointment or surprise. This lesson combines form, context, examples, common mistakes, and practice so you can use the pattern in real communication.

12 minNihongo Hub Editorial TeamPublished 2026-06-06Updated 2026-06-06

Learning objectives

  • Lesson goals: Learn hazu datta for "was supposed to happen but didn't" — expressing disappointment or surprise.
  • Form and connection: [Plain form] はずだった
  • Nuance in real use: はずだった captures those "should have been but wasn't" moments — a gentle protest against a world that didn't follow logic. In Japanese, it's one of the most elegant ways to express disappointment.

Form and connection

[Plain form] はずだった

Core Explanation

Learn hazu datta for "was supposed to happen but didn't" — expressing disappointment or surprise.

Cultural Note

はずだった captures those "should have been but wasn't" moments — a gentle protest against a world that didn't follow logic. In Japanese, it's one of the most elegant ways to express disappointment.

Practical examples

He was supposed to come too.
Today was supposed to be a day off, but...
It was supposed to be easier.

Common pitfalls

Build the base form before adding the pattern

Complete the required conjugation first. Do not keep polite and plain endings at the same time.

Match politeness to the situation

The examples are reliable starting points; relationships and context can still change the most natural wording.

Practice and answers

1. Write the connection formula for this lesson.
Show answer[Plain form] はずだった
2. Explain the meaning of the first example.
Show answerHe was supposed to come too.
3. Rewrite the final example using this lesson pattern.
Show answerもっと簡単かんたんなはずだった。 ([Plain form] はずだった)

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