How do you use "as / since / because" in a sentence?

I left early because I was tired.' (reason) Since you're here, let's start.' (known fact) As it was raining, we stayed inside.' (circumstance) Why did you leave?' 'Because I was tired.

as / since / because

Q: What does "as / since / because" mean?

Different ways to give reasons All three give reasons, but with subtle differences. 'Because' is most common and emphatic for new information. 'As' and 'since' often introduce known reasons and go at the beginning. 'Because' can answer 'why?' but 'as/since' usually can't.

Grammar Pattern BritishAmericanAustralian ★★★★★ Very Common Neutral

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Significado: Different ways to give reasons

表达理由的不同方式

Diferentes formas de dar razones

理由を述べるさまざまな方法

이유를 나타내는 다양한 방법

All three give reasons, but with subtle differences. 'Because' is most common and emphatic for new information. 'As' and 'since' often introduce known reasons and go at the beginning. 'Because' can answer 'why?' but 'as/since' usually can't.

这三个词都表示原因，但有细微差别。'Because'最常用，用于强调新信息。'As'和'since'常用于引出已知原因，通常放在句首。'Because'可以回答'why?'，但'as/since'通常不能。

Los tres dan razones, pero con diferencias sutiles. 'Because' es más común y enfático para información nueva. 'As' y 'since' a menudo introducen razones conocidas y van al principio. 'Because' puede responder a 'why?' pero 'as/since' normalmente no.

3つとも理由を示しますが、微妙な違いがあります。「Because」は最も一般的で、新しい情報を強調するのに使います。「As」と「since」は既知の理由を導入することが多く、文頭に来ます。「Because」は「why?」に答えられますが、「as/since」は通常できません。

세 가지 모두 이유를 나타내지만, 미묘한 차이가 있습니다. 'Because'는 새로운 정보에 대해 가장 흔하고 강조적으로 사용됩니다. 'As'와 'since'는 이미 알려진 이유를 소개할 때 자주 사용되며 문장 앞에 옵니다. 'Because'는 'why?'에 대한 답변으로 쓸 수 있지만, 'as/since'는 보통 쓸 수 없습니다.

Ejemplos

I left early because I was tired.' (reason)
我提前离开了，因为我累了。'（原因）
Me fui temprano porque estaba cansado.' (razón)
疲れていたので、早く帰りました。'（理由）
피곤해서 일찍 떠났어요.' (이유)
Since you're here, let's start.' (known fact)
既然你来了，我们开始吧。'（已知事实）
Ya que estás aquí, empecemos.' (hecho conocido)
ここにいるので、始めましょう。'（既知の事実）
여기 왔으니까, 시작합시다.' (알려진 사실)
As it was raining, we stayed inside.' (circumstance)
因为在下雨，我们待在室内。'（情况）
Como estaba lloviendo, nos quedamos adentro.' (circunstancia)
雨が降っていたので、中にいました。'（状況）
비가 오고 있었기 때문에, 안에 있었어요.' (상황)
Why did you leave?' 'Because I was tired.
你为什么离开？''因为我累了。
¿Por qué te fuiste?' 'Porque estaba cansado.
なぜ帰ったの？」「疲れていたから。
왜 떠났어요?' '피곤했으니까요.

Pronunciación

Guía de uso

Contexto: spoken, written, everyday

Tono: explanatory

✓ Correcto

I'm happy because she's coming.
我很高兴因为她要来了。
Estoy feliz porque ella viene.
彼女が来るので嬉しいです。
그녀가 오니까 기뻐요.
Since we're both free, let's meet.
既然我们两个都有空，我们见面吧。
Ya que ambos estamos libres, vamos a reunirnos.
二人とも暇なので、会いましょう。
둘 다 시간이 있으니까 만납시다.
As you know, the deadline is tomorrow.
如你所知，截止日期是明天。
Como sabes, la fecha límite es mañana.
ご存知のように、締め切りは明日です。
아시다시피 마감일은 내일입니다.
Because of the rain, we cancelled.
因为下雨，我们取消了。
Debido a la lluvia, cancelamos.
雨のため、キャンセルしました。
비 때문에 취소했어요.
The reason is that I was tired.
原因是我累了。
La razón es que estaba cansado/a.
理由は、疲れていたからです。
이유는 내가 피곤했기 때문이다.
Because I was tired, I left.
因为我累了，所以我离开了。
Como estaba cansado/a, me fui.
疲れていたので、帰りました。
피곤했기 때문에 떠났다.
Why? Because I was tired.
为什么？因为我累了。
¿Por qué? Porque estaba cansado/a.
なぜ？疲れていたからです。
왜? 피곤했으니까.

✗ Incorrecto

The reason is because I was tired. (redundant)
The reason is because I was tired.（冗余）
The reason is because I was tired. (redundante)
The reason is because I was tired.（冗長）
The reason is because I was tired.（중복）
Because of I was tired, I left. ('because of' + noun)
Because of I was tired, I left.（'because of'+名词）
Because of I was tired, I left. ('because of' + sustantivo)
Because of I was tired, I left.（「because of」+ 名詞）
Because of I was tired, I left.（'because of' + 명사）
Why? Since I was tired. (use 'because' to answer why)
Why? Since I was tired.（用'because'回答why）
Why? Since I was tired. (usar 'because' para responder a why)
Why? Since I was tired.（whyには「because」で答える）
Why? Since I was tired.（why에는 'because'로 답할 것）

Origen e historia

Reason subordinators

Contexto cultural

Era: Modern

Generation: All ages

Social background: Universal

Más de este tema

so that / in order to ★★★★★ Expressing purpose so that ★★★★★ Expressing purpose with a clause to + verb vs for + noun/-ing ★★★★★ Expressing purpose with different structures until / till ★★★★★ Up to a certain time although / despite / in spite of ★★★★☆ Expressing contrast and unexpected outcomes however / nevertheless / nonetheless ★★★★☆ Formal connectors showing contrast between sentences