Translation guide
The English word "was" is the past tense of "be". Japanese does not have a direct equivalent that works in all cases. This guide explains how to express past states, existence, and copula functions naturally in Japanese.
It was fun. (casual)
There was a cat.
I was eating.
Expressing that something was a certain way (e.g., "It was fun", "She was a teacher").
Polite past tense of the copula. Use for formal situations or when speaking politely.
Yesterday was fun.
She was a teacher.
Plain past tense of the copula. Used in casual speech or informal writing.
Yesterday was fun.
Very formal/humble past copula. Rarely used outside keigo-heavy business or ceremonial contexts.
This was the conference room.
Saying that something existed or was present in the past (e.g., "There was a cat", "I was at home").
Polite past of いる (iru), used for animate things (people, animals).
There was a cat.
Describing an ongoing action or state in the past (e.g., "I was eating", "It was raining").
Polite past progressive. Attach to te-form of verb.
Indicating that something was done to the subject (e.g., "It was built", "I was told").
Polite past passive. Formed with passive stem + ました.
In Japanese, the equivalent of "was" is often omitted when the past context is already established or obvious.
In casual conversation, especially when the topic is understood, the copula or existence verb can be dropped. This is very common.
English requires a verb in every sentence, but Japanese often omits the copula or existence verb when it's clear from context. Overusing でした/だった can sound unnatural.
A: Who did it? B: It was me.
She was a teacher.
I was at home.
Polite past of ある (aru), used for inanimate things and abstract concepts.
There was a book on the desk.
There was a problem.
Plain past of いる. Casual.
There was a cat.
Plain past of ある. Casual.
There was a book.
I was eating.
It was raining.
Plain past progressive. Casual.
I was eating.
This building was built last year.
I was praised by the teacher.
Plain past passive. Casual.
It was built.
Was it fun yesterday? — Yeah, it was fun.
What about the cat? — It was there.
でした is the polite form, used with strangers, superiors, and in formal settings. だった is the plain form, used with friends, family, and in informal writing. Choose based on your relationship with the listener.
When "was" is part of an explanation or reason, consider using のだ (plain) or んです (polite) in past tense: だったのだ / だったんです.
The reason I was late was that the train was delayed.