電話するの を 忘れて ごめん なさい。denwasuruno wo wasurete gomen nasai.
Please forgive me for forgetting to call you.
Sentence from Tatoeba

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Note
Sentence from TatoebaBreakdown of denwasuruno wo wasurete gomen nasai.
をwo
direct object particle
電話するdenwasuru
to call, to telephone
忘れるwasureru
to forget
ごめん なさい。gomen nasai.
I beg your pardon; Excuse me.
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“How do verb conjugations work in Japanese?”
Japanese verbs conjugate based on tense, politeness, and mood. For example, the polite present form adds ‑ます to the verb stem, while the past tense uses ‑ました. Unlike English, Japanese verbs don't change based on the subject — the same form works for "I", "you", and "they".
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