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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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なる， 成る， 為る
1. to become, to get, to grow, to turn, to reach, to attain
2. to result in, to turn out, to end up, to prove (to be)
3. to consist of, to be composed of, to be made up of
4. to be completed, to be realized, to succeed, to be attained, to be accompli...
成为，达到，取得；变成
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
