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不規則過去形動詞の文法練習
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Simple Past Grammar: What did you do? Learn the Simple Past Tense! / 過去形の文法: 貴方は何をしましたか。 過去形を学ぶ。
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『GENKI 1』Lesson 4 (4): The Past tense of Verbs ~ました (mashita), ~ませんでした (masendeshita)
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