立彬の日本語

彼は三年間メアリーと交際している。

tbd

He has been keeping company with Mary for three years.
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年間， ねんかん
1. (period of) a year 2. during the era (of)
一年中，一年间；……年间
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交際， こうさい
1. company, friendship, association, society, acquaintance 2. (romantic) involvement, dating
公司、友谊、协会、社会、相识；(浪漫)关系，约会
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彼(かれ)[01]
彼， かれ
1. he, him 2. boyfriend
他
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は
は
1. indicates sentence topic 2. indicates contrast with another option (stated or unstated) 3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
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三
と
と
1. if, when 2. and 3. with 4. used for quoting (thoughts, speech, etc.) 5. promoted pawn 6. indicates a question
表示引用
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為る(する){している}
する， 為る
1. to do, to carry out, to perform 2. to cause to become, to make (into), to turn (into) 3. to serve as, to act as, to work as 4. to wear (clothes, a facial expression, etc.) 5. to judge as being, to view as being, to think of as, to treat as, to use...
做，作，干，执行
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