Structure
Verb[る] + と同時に
[い]Adjective + と同時に
[な]Adjective + である + と同時に
Noun + (である) + と同時に
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Standard
使用域
一般
About と同時に
To convey that things are happening at the same time in Japanese, と同時に will often be used. This is a combination of the case marking particle と in its listing particle use, 同時, a noun meaning 'the same time', and に, the case marking particle marking a location.
と同時に translates as 'at the same time as (A)', 'the instant that (A)', or 'as well as (A)'. In sentences that use this grammar structure, (A) is considered to be the primary event, but any (B) or (C) events are not considered any less important.
In the case of nouns and な-Adjectives, である is often omitted.
While the literal meaning of と同時に is 'at the same time', this expression is also regularly used when listing multiple roles or functions that someone/thing has. This comes across as 'as well as', but still carries the 'at the same time nuance'.
Synonyms
Examples
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演技が終わると同時に、観客から拍手が起こった。
The audience erupted in applause the instant the show was over. (at the same time as)
演奏が始まると同時に、彼は眠ってしまった。
The moment the performance started, he fell asleep. (at the same time as)
道を横断し終わると同時に、信号が赤に変わった。
The instant I crossed the street, the traffic light turned red. (at the same time as)
引っ越すと同時に髪型を変えてみようと思っています。
I am thinking about changing my hairstyle the instant I move. (at the same time as)
目覚めると同時に着替えて出かけた。
The moment I woke up, I got dressed and went out. (at the same time as)
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Additional Example Sentences
Takoboto
「Learn Japanese」 X + と同時に + Y as “Y at the same time as X”
Learn Japanese YouTube
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Tobira
Page 358
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と同時に – Grammar Discussion
Most Recent Replies (4 in total)
Daru
Added the video and fixed the resources!
imsamuka
If と同時に uses the と listing particle, can we list various things before と同時に? There’s a difference in nuance in this case?
IcyIceBear
I see it as more of a “together” particle here. Like サムと一緒に together with sam. With the same time as と同時に. Besides that I don’t know if it would work for multiple things. Another translation is “the instant” so not a lot of things can be done in that time frame. There’s probably better grammar to use in that case like 間に
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