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いつでも， なんどきでも， 何時でも
1. always, all the time, at all times
2. (at) any time, whenever (you like)
tbd
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使う， 遣う， つかう
1. to use (a tool, method, etc.), to make use of, to put to use
2. to use (a person, animal, puppet, etc.), to employ, to handle, to manage, to manipulate
3. to use (time, money, etc.), to spend, to consume
4. to use (language), to speak
使用（工具、方法等），利用，使处于可用状态；用(时间)，花(钱)，花费，消耗，耗费；使用（某人、某动物、木偶等），雇佣，处理，管理，掌控；使用（语言），说话
の
1. indicates possessive
2. nominalizes verbs and adjectives
3. substitutes for "ga" in subordinate phrases
4. (at sentence-end, falling tone) indicates a confident conclusion
5. (at sentence-end) indicates emotional emphasis
6. (at sentence-end, risi...
句尾起强调作用；助词，表示所有关系