「〜のは〜はずだ」- The Reason... Should Be...
Explanation
「〜のは〜はずだ」 is a Japanese grammatical structure used to express "the reason... should be..." It is typically used to speculate on the cause of a certain phenomenon or behavior, with a sense of certainty.
Grammar Pattern
| Grammar Point | Connection | Explanation |
|---|---|---|
| 〜のは〜はずだ | Verb/Adjective plain form + のは + Verb/Adjective plain form + はずだ | Used to speculate on the cause of a phenomenon or behavior, with a sense of certainty. |
Basic Usage
Connection
- Verb plain form + のは + Verb plain form + はずだ
- Adjective plain form + のは + Adjective plain form + はずだ
Meaning
- Expresses "the reason... should be..." and is used to speculate on the cause.
Examples
彼 が遅 れているのは事故 があったはずだ。- Kare ga okurete iru no wa jiko ga atta hazu da.
- The reason he is late should be that there was an accident.
彼女 が怒 っているのは私 が約束 を破 ったはずだ。- Kanojo ga okotte iru no wa watashi ga yakusoku o yabutta hazu da.
- The reason she is angry should be that I broke the promise.
彼 が元気 がないのは風邪 を引 いたはずだ。- Kare ga genki ga nai no wa kaze o hiita hazu da.
- The reason he seems unwell should be that he caught a cold.
この 料理 が美味 しくないのは塩 が足 りないはずだ。- Kono ryouri ga oishikunai no wa shio ga tarinai hazu da.
- The reason this dish doesn't taste good should be that there isn't enough salt.
Comparison and Differences
Although both 「〜のは〜はずだ」 and 「〜のは〜からだ」 are used to explain reasons, they differ in tone and certainty.
| Grammar Point | Tone | Certainty |
|---|---|---|
| 「〜のは〜はずだ」 | Speculative | With a sense of certainty |
| 「〜のは〜からだ」 | Definitive | Clear cause-and-effect relationship |
Example:
彼 が遅 れているのは事故 があったからだ。- Kare ga okurete iru no wa jiko ga atta kara da.
- The reason he is late is because there was an accident.
Deep Dive
「〜のは〜はずだ」 is primarily used to speculate on the cause of a phenomenon or behavior, with a sense of certainty. It is commonly used in everyday conversations to express the speaker's speculation about a situation.
Summary
「〜のは〜はずだ」 is a Japanese grammatical structure used to express "the reason... should be..." It is mainly used to speculate on causes with a sense of certainty. Mastering this structure will help you better express your speculations and judgments in everyday conversations.