〜わけだ

It means that...; Therefore...

1. Overview

「〜わけだ」 is a grammatical structure used to explain a reason or a conclusion based on the preceding context. It conveys that a particular situation or statement logically follows from what has been previously mentioned, emphasizing the speaker's understanding or realization.

2. Structure

• Verb (plain form) + わけだ
• Adjective (plain form) + わけだ
• Noun + というわけだ

3. Usage Explanation

• Indicating Reason or Conclusion:
  This structure is used to express that a certain conclusion can be drawn from the previous statement or situation, clarifying the reason behind something.

• Emphasizing Understanding:
  It often emphasizes the speaker’s understanding or realization of a situation, suggesting that the conclusion is self-evident or logical.

• English Translation:
  It can be translated as "It means that...", "Therefore...", or "That's why...".

4. Example Sentences

1. 彼は毎日遅くまで働いているから、疲れているわけだ。
   He works late every day, so it means he is tired.

2. この問題は難しい。解けないのは当然というわけだ。
   This problem is difficult, so it's only natural that you can't solve it.

3. 天気が悪いから、ピクニックは中止するわけだ。
   Because the weather is bad, we will cancel the picnic.

4. 彼女が来ないと言っていたので、予定が変わるわけだ。
   She said she wouldn't come, so it means our plans will change.

5. 最近運動していないから、体重が増えたわけだ。
   I haven't been exercising lately, so that's why I gained weight.

5. Key Points to Note

• Logical Conclusion:
  「〜わけだ」 is often used to explain a logical conclusion based on previous information, making it a common structure in discussions and explanations.

• Emphasis on Understanding:
  The expression carries a tone of understanding, as if the speaker is drawing a conclusion that should be evident to others as well.

6. Similar Grammar

• 〜ということだ: Indicates a similar conclusion or explanation but can be less emphatic.
  • Example: 彼が行かないということだ。
    It means he won't go.

7. Alternative Grammar

• 〜からだ: A more direct way to indicate a reason.
  • Example: 疲れているから、休むべきだ。
    You're tired, so you should rest.

8. Summary

「〜わけだ」 is used to explain a reason or conclusion that logically follows from the preceding context. It emphasizes the speaker's understanding and provides clarity regarding a situation, making it a valuable structure for explanations and reasoning.