I have to exercise for 1 hour in Japanese 🇯🇵

Sentence info.

わたし は うんどう を いち じかん しなければ なりません。

Explanation:
1. わたし (watashi) – "I"
2. は (wa) – Topic marker indicating "watashi" is the topic of the sentence.
3. うんどう (undō) – "exercise"
4. を (wo/o) – Object marker indicating "undō" is the object of the verb.
5. いち じかん (ichi jikan) – "one hour"; "いち" (ichi) means "one" and "じかん" (jikan) means "hour".
6. しなければ (shinakereba) – Conditional form of "する" (suru), which means "to do". "Shinakereba" translates to "if not do".
7. なりません (narimasen) – Negative form of "なる" (naru), which means "to become". When combined with "しなければ", it conveys necessity or obligation, translating to "have to do".

Tips to Remember:
– When you want to indicate a necessity or obligation in Japanese, the structure "Verb stem + なければ なりません" is often used.
– Breaking it down: "しなければ" (if not do) + "なりません" (will not become).
– Use a topic marker (は) to indicate what the subject is about and an object marker (を) to show what the action affects.

Alternate Ways to Say "I have to exercise for 1 hour":
– わたし は いち じかん うんどう を しなければ いけません。
– (Watashi wa ichi jikan undō o shinakereba ikemasen.)
– Using "いけません" (ikemasen) also conveys necessity.

– わたし は いち じかん うんどう を しないと いけません。
– (Watashi wa ichi jikan undō o shinaito ikemasen.)
– Using "しないと" (shinaito) instead of "しなければ" provides a slightly different nuance, but it still means "have to".

– わたし は いち じかん うんどう を しなければ だめです。
– (Watashi wa ichi jikan undō o shinakereba dame desu.)
– Using "だめです" (dame desu) to mean "have to" in a more informal way.

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