How to Say ‘Did not (polite past)’ in Japanese
～ませんでした
mase n deshi ta
[mah-seh n deh-shee tah]
💬 Usage Tip: Verb stem + [ませんでした] = “didn’t.” Example: [食べませんでした] (didn’t eat).
🇯🇵 In Japan: Polite negatives help keep things formal and calm when you’re discussing problems.
Phrase Breakdown
ませ
mase
[mah-seh]
(part of polite negative)
Part of the polite negative form 「ません」. Used with a verb stem to mean “do not,” and with でした to make past: “did not.”
気づきませんでした。
I didn't notice.
ん
n
[n]
(negative ending sound)
Completes 「ません」. In 「～ませんでした」 it contributes to “did not (do)” in polite speech.
大きいと分かりませんでした。
I didn't realize it was loud.
でし
deshi
[deh-shee]
was (polite) (part)
Part of 「でした」 (past polite form of です). Used after ません to make past negative: “did not.”
気づきませんでした。
I didn't notice.
た
ta
[tah]
past marker
Completes 「でした」. Together with ません, it forms polite past negative: “did not.”
知りませんでした。
I didn't know.
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