GrammarN42 min read2026-02-17

付属文の主語

Using が to mark the subject of dependent clauses in compound sentences

Meaning

In Japanese sentences with two clauses, the dependent clause (the subordinate part) uses the particle が to mark its subject, while the main clause typically uses は. This pattern appears in structures like ~とき (when), ~てから (after), ~まえに (before), and ~ても (even if). The particle が is preferred in dependent clauses because it emphasizes the subject of that specific clause rather than making a general statement.

Formation

Part of speechFormation
附属句主语附属句中的主语用助词「が」标记(而非「は」)
主句主语主句中的主语用助词「は」标记

Examples

  1. お金がなくても、幸せです。
    Even if there is no money, I am happy.

  2. 仕事が終わってから、ご飯を食べます。
    After the work is finished, I will eat.

  3. 雨が降ったら、ハイキングに行きません。
    If it rains, I won't go hiking.

  4. 体の調子が悪いとき、いつも沢山寝ています。
    When my health is bad, I always sleep a lot.

Summary

  • Use が to mark the subject in dependent clauses, not は
  • This applies to structures like ~とき、~てから、~まえに、~ても
  • The main clause subject may be omitted but would use は if expressed

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