1. Basic structure
| Type | Formation with ～し、～し、～ | Examples | Notes |
|---|
| Verb | V普通形＋し | 頑張るし、続けるし | List reasons/attributes |
| Aい | Aい＋し | 安いし、新しいし | Keep い |
| Aな／N | Aな/N＋だし | 便利だし、学生だし | Polite: ですし |
| Sequence | …し、…し、（だから）… | 安いし、近いし、買おう。
忙しいし…（終止） | Open-ended finish allowed |
2. Main meaning & detailed analysis
- List multiple reasons/pros/cons “and also…”, supporting a conclusion.
- Conveys that multiple factors are simultaneously true; mildly polite, natural.
- Ending with し implies there are other reasons left unsaid.
3. Illustrative examples
- このアプリは無料だし、使いやすいし、おすすめです。
This app is free and easy to use; I recommend it. - 駅に近いし、静かだし、ここに住みたい。
It's close to the station and quiet; I want to live here. - 今日は雨だし、寒いし、家にいよう。
It's raining today and it's cold; let's stay home. - 時間もないし…また今度。
I don't have time either… maybe next time.
4. Usage & nuance
- When persuading/giving reasons, place the strongest factor at the end of the chain to lead into the conclusion.
- In formal writing, you can replace the final part with ～上に／さらに for clearer coherence.
- Avoid overusing too many し clauses in a single long sentence.
5. Comparison, distinctions, and similar patterns
| Pattern | Meaning | Difference | Examples |
|---|
| ～し | Listing reasons | Soft, conversational | 安いし、速いし |
| ～て、～て | Sequence of actions | Does not convey "reason" | 食べて、寝て |
| ～上に | Moreover | Formal, cumulative | 便利な上に安い |
| ～たり | Listing representative examples | Not for reasons | 映画を見たりする |
6. Additional notes
- Soft refusal tip: 今は忙しいし…また今度でいい？
- Add それに/しかも before the final clause to emphasize the key point.
7. Variations & fixed phrases
- AしBしC (listing ≥2 factors)
- …し…し、それに… (with an intensifying conjunction)
- …し…（終止）= “because there are many other reasons”
8. Common mistakes & JLPT traps
- Dropping だ with な-adjectives/N: ×便利し → 便利だし.
- Confusing it with ～て to state reasons. JLPT often requires choosing し when “multiple reasons” are needed.
- Ending with し in formal writing can feel incoherent if there is no clear conclusion.
