Lesson 39 at a glance
1. Vて / Adjくて / Nで
Connect a cause to a natural, non-volitional result.
2. Nで
Express “because of / due to” an event, accident, illness, disaster, etc.
3. ～ので
Give a reason in a softer, explanatory way.
4. ～途中で
Describe something happening “during” or “on the way.”
1. Giving a reason with Vて / い-adjectiveくて / な-adjectiveで
This pattern connects a cause or reason directly to a result. The reason comes first, and the result comes second.
1A. Verb-て + result
I was surprised to hear the news of the earthquake.
地震のニュースを 聞いて、 びっくりしました。
Jishin no nyūsu o kiite, bikkuri shimashita.
Hearing the earthquake news caused the speaker to feel surprised.
I am sad because I cannot meet my friends.
友達に 会えなくて、 寂しいです。
Tomodachi ni aenakute, sabishii desu.
会えない → 会えなくて. The inability to meet friends causes the feeling of loneliness.
行かない → 行かなくて
分からない → 分からなくて
会えない → 会えなくて
1B. い-adjective → ～くて
い-adjective: remove い + くて難しい 漢字が 多くて、 新聞が 読めません。
Muzukashii kanji ga ōkute, shinbun ga yomemasen.
There are many difficult kanji, so I cannot read the newspaper.
The second clause contains the potential negative 読めません, so it describes inability rather than the speaker giving an order or making a request.
1C. な-adjective / noun → ～で
な-adjective / Noun + で + result説明が 複雑で、 全然 分かりません。
Setsumei ga fukuzatsu de, zenzen wakarimasen.
The explanation is complicated, so I cannot understand it at all.
静かで、 よく 眠れました。
It was quiet, so I was able to sleep well.
When is this pattern natural?
The second clause normally describes a non-volitional result. In other words, it is not something the speaker is deliberately choosing to command, request, invite, or decide to do.
| Natural result after ～て / ～くて / ～で | Example type |
|---|---|
| Emotion / feeling | surprised, relieved, sad, troubled |
| Ability / inability | can read, cannot understand, cannot go |
| State / condition | became late, became crowded, was delayed |
| Past result | was scolded, train was delayed |
Past result
事故があって、 電車が 遅れました。
There was an accident, so the train was delayed.
宿題を 持って 来なくて、 先生に 叱られました。
I did not bring my homework, so I was scolded by the teacher.
Important restriction: do not use it for commands, requests, invitations, or deliberate decisions
Not natural for a prohibition
× 危なくて、 機械に 触らないでください。
○ 危ないですから、 機械に 触らないでください。
It is dangerous, so please do not touch the machine.
Not natural for a request
電車が 遅れましたから、 待ってください。
The train was delayed, so please wait for me.
The cause should normally come before the result in time
This connective naturally presents a cause first and then its result. If the supposed “cause” happens later than the action in the second clause, the relationship becomes unnatural.
明日 会議がありますから、 今日 準備しなければなりません。
There is a meeting tomorrow, so I have to prepare today.
2. Noun + で — “because of / due to”
Nで can indicate the cause of an event or result. The noun is often something such as an accident, disaster, illness, weather event, or another circumstance.
火事で 家が 焼けました。
Kaji de ie ga yakemashita.
The house burned down because of the fire.
地震で ビルが 倒れました。
A building collapsed because of the earthquake.
台風で 新幹線が 止まりました。
The Shinkansen stopped because of the typhoon.
病気で 旅行に 行けませんでした。
I could not go on the trip because of illness.
病気で 会社を 休みました。
I took the day off work because of illness.
Nで has the same volition restriction
When the following sentence describes a deliberate desire, request, order, invitation, or similar volitional meaning, Nで is generally not the Lesson 39 pattern you want.
× 病気で、 明日 会社を 休みたいです。
○ 病気ですから、 明日 会社を 休みたいです。
I am sick, so I want to take tomorrow off work.
3. ～ので — giving a reason softly and naturally
Noun / な-adjective + なので
～ので means “because / since.” It presents the reason as an explanation for what follows. It often sounds softer and less assertive than ～から.
How to form ～ので
| Type | Form | Example |
|---|---|---|
| Verb | Plain form + ので | 行くので |
| い-adjective | Plain form + ので | 忙しいので |
| な-adjective | な + ので | 静かなので |
| Noun | な + ので | 休みなので |
Examples
I lived in Thailand for two years, so I can speak a little Thai.
タイに 二年 住んでいたので、 タイ語が 少し 話せます。
The reason explains the speaker's present ability.
Today is my husband's birthday, so I will buy a cake and go home.
今日は 夫の 誕生日なので、 ケーキを 買って 帰ります。
Noun + なので: 誕生日なので.
Softly asking permission
気分が 悪いので、 早退してもいいですか。
I do not feel well, so may I leave early?
Asking to take the afternoon off
ビザを 取りに 行かなければならないので、 午後から 休んでもいいですか。
I have to go get my visa, so may I take the afternoon off?
Polite request with a reason
この 荷物は 邪魔なので、 片付けていただけませんか。
This luggage is in the way, so could you please put it away?
Plain form and polite form before ので
The basic form taught at this level is the plain form + ので. In polite speech, however, polite forms before ので can also occur.
用事があるので、 お先に 失礼します。
I have something to do, so please excuse me for leaving first.
用事がありますので、 お先に 失礼します。
The second version is more formally polite.
Restriction with strong commands and prohibitions
For direct orders or prohibitions, から is normally the safer and more natural choice.
× 危ないので、 機械に 触るな。
○ 危ないから、 機械に 触るな。
It's dangerous, so don't touch the machine.
4. ～から vs ～ので
| Point | ～から | ～ので |
|---|---|---|
| Basic meaning | because | because / since |
| Tone | more direct | often softer / explanatory |
| Speaker's judgment | often stronger | often presented as natural circumstances |
| Commands / direct requests | very natural | less natural with blunt commands |
| Polite explanations / excuses | possible | especially common |
時間がないから、 急ぎましょう。
We don't have time, so let's hurry.
時間がないので、 先に 失礼します。
I don't have time, so please excuse me for leaving first.
5. ～途中で — “during / in the middle of / on the way”
Noun + の + 途中で
途中 means “in the middle of,” “during,” or “on the way.” It describes an event that happens before the first activity or journey is completed.
On the way here
実は、 ここへ 来る 途中で 事故があって、 バスが 遅れたんです。
Actually, there was an accident on my way here, and the bus was delayed.
During a marathon
マラソンの 途中で、 あのビルが 爆発しました。
That building exploded during the marathon.
During a speech
スピーチの 途中で、 吐き気がしました。
I felt nauseous during the speech.
Verb vs noun formation
| Type | Pattern | Example |
|---|---|---|
| Verb | Dictionary form + 途中で | 帰る 途中で |
| Noun | N + の途中で | 会議の 途中で |
会社へ 行く 途中で コンビニに 寄りました。
I stopped at a convenience store on the way to work.
映画の 途中で 寝てしまいました。
I fell asleep in the middle of the movie.
6. Real-life mini conversations
At work
A： どうして 遅れたんですか。
A: Why were you late?
B： 会社へ 来る 途中で 事故があって、 電車が 遅れたんです。
B: There was an accident on my way to work, so the train was delayed.
Asking a manager for permission
気分が 悪いので、 今日は 早く 帰ってもいいでしょうか。
I don't feel well, so would it be all right if I went home early today?
Explaining inability
字が 小さくて、 よく 読めません。
The characters are small, so I cannot read them well.
7. Common mistakes
Use ～から when the second clause is a direct request, order, prohibition, invitation, or deliberate decision.
高い → 高くて
静か → 静かで
× 休みので
○ 休みなので
Both occur in polite and casual speech. Their difference is more about tone and viewpoint.
The tense of the whole cause-result sentence is normally shown in the final predicate.
事故があって、 電車が 遅れました。
8. Quick cheat sheet
| Grammar | Meaning | Main restriction / nuance |
|---|---|---|
| Vて / Adjくて / Nで | because / so | Natural non-volitional result |
| Nで | because of / due to | Often accidents, illness, disasters, circumstances |
| ～から | because | Direct; good with commands, requests, decisions |
| ～ので | because / since | Softer, explanatory, often useful for polite reasons |
| Vる途中で | on the way / while in the middle of | Action not yet completed |
| Nの途中で | during N | Something occurs partway through the event |
9. Practice
A. Change into the correct reason form
- 漢字が 多い → ________、 新聞が 読めません。
- 友達に 会えない → ________、 寂しいです。
- 説明が 複雑 → ________、 分かりません。
- 多くて
- 会えなくて
- 複雑で
B. Choose から or ので
- “It's dangerous, so don't touch it.” direct prohibition
- “I don't feel well, so may I leave early?” soft explanation + permission
- “We don't have time, so let's hurry.” invitation / volition
- から
- ので is especially natural
- から
C. Translate into Japanese
- There was an accident, so the train was delayed.
- I am sick, so may I go home early?
- I stopped at a convenience store on my way home.
- The house burned down because of a fire.
- The explanation is complicated, so I cannot understand it.
Sample answers — other natural wordings are also correct.
-
事故があって、 電車が 遅れました。
-
病気なので、 早く 帰ってもいいですか。
-
家へ 帰る 途中で、 コンビニに 寄りました。
-
火事で 家が 焼けました。
-
説明が 複雑で、 分かりません。
10. Final memory rule
Aて / Aくて / Aで → B
A naturally causes B. B is normally not a command, request, invitation, or deliberate decision.
Nで → B
Because of an event/circumstance such as an accident, illness, disaster, etc., B happened.
Aので → B
A is the explanatory reason for B. Often softer than から.
Vる / Nの + 途中で
Something happens while the activity, event, or journey is still in progress.