Text: Past Negative Desu Form by LearningJapanese, literature
Literature
Text: Past Negative Desu Form
To make past negative sentences, we combine both 'ja arimasen' and 'deshita' into one.
それはわたしのいぬじゃありませんでした。
Sore ha watashi no inu ja arimasen deshita.
That was not my dog.
'Ja arimasen' makes the sentences negative and adding 'deshita' puts it in the past tense. 'Deshita' will always go after the negation and both will take the place of 'desu'.
To make a more formalized sentence, just replace 'ja arimasen' with 'dewa arimasen' as you saw previously.
これはえんぴ&