立彬の日本語

約束を守ることを誓わなければいけない。

tbd

You must bind yourself to keep the promise.
You must swear to keep your promise.
You must promise to keep your promise.
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約束を守る， 約束をまもる， やくそくをまもる
1. to keep a promise, to keep one's word
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を
1. indicates direct object of action 2. indicates subject of causative expression 3. indicates an area traversed 4. indicates time (period) over which action takes place 5. indicates point of departure or separation of action 6. indicates object of d...
表示动作的直接对象；表示经过的场所；表示离开或分开的点
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誓う， 盟う， ちかう
1. to swear, to vow, to take an oath, to pledge
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なければならない， なければなりません， なければいけない
1. have to do, must, should, ought to
必须，应该
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事(こと){こと}
こと， 事， 縡
1. thing, matter 2. incident, occurrence, event, something serious, trouble, crisis 3. circumstances, situation, state of affairs 4. work, business, affair 5. after an inflectable word, creates a noun phrase indicating something the speaker does not ...
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