Mastering the distinction between ～ている and ～てある to describe states of being and completed actions.
Context
Describing the scene
Imagine you walk into a room. You see a window that is open, and you see that someone has left a note on the table. How do you describe these two different situations?
In Japanese, describing the state of an object depends on whether you are focusing on the natural state of the object itself or the fact that someone performed an action to leave it in that state. Understanding this distinction is crucial for natural communication.
Explanation
～ている vs ～てある
We use ～ている with intransitive verbs to describe a state, and ～てある with transitive verbs to describe a state resulting from a deliberate action.
Intransitive Verbている/Transitive Verbてある
Use [Intransitive Verb] + ている to describe the current state of something without focusing on who did it. For example, 'The door is open' (ドアが開いている) focuses on the state of the door.
Use [Transitive Verb] + てある to describe a state that exists because someone intentionally performed an action. For example, 'The door has been opened' (ドアが開けてある) implies someone opened it for a specific purpose.
Tip
Remember: ～てある always uses the particle が to mark the object that is in that state, because the focus is on the object's condition.
Examples
Examples in context
Observe the difference in focus between these sentences.
窓が開いている。
The window is open.
窓まどwindow開いているあいているis open (intransitive)
窓が開けてある。
The window has been opened (by someone).
窓まどwindow開けてあるあけてあるhas been opened (transitive)
テーブルの上に本が置い【てある】。
Hint: Use the transitive state marker.
A book has been placed on the table.
Usage
Nuance and Usage
When should you use one over the other?
State vs. Intent
～ている
Focuses on the current appearance or state.
電気がついている (The light is on).
～てある
Focuses on the result of a previous action.
電気がつけてある (The light has been turned on [for a reason]).
Which sentence implies that someone prepared the room beforehand?
部屋が片付いている
✓ 部屋が片付けてある
～てある implies a deliberate action was taken to prepare the state.
Deep dive
Deep dive: Intentionality
The nuance of ～てある is often tied to preparation.
Because ～てある implies an action was performed for a purpose, it is frequently used when talking about preparations for an event or a meeting. If you see a document on a desk, saying 「書類が置いてある」 suggests it was left there intentionally for you to read or use.
Summary
Summary
Recap of the lesson.
In summary, use ～ている with intransitive verbs to describe a natural state, and ～てある with transitive verbs to describe a state resulting from someone's intentional action. Mastering this helps you convey not just what the world looks like, but the history behind why it looks that way.