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From Lesson 282:Have to do - ないといけない·Japanese
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Usages of to

気き　を　付つけて　ね。　めちゃ　熱あつい。　水みず　を　飲のまない　と。ki o tsukete ne. mecha atsui. mizu o nomanai to.
Watch out. It’s super hot. You have to drink some water.
妻つま　と　子こ供どもたち　と　一いっ緒しょ　に　住すんで　います。tsuma to kodomotachi to issho ni sunde imasu.
(I) live together with my wife and children.
〜ない　と　いけない〜nai to ikenai
to have to do 〜
〜ない　と　ダメ　(です)〜nai to dame (desu)
to have to do 〜
道みち　を　渡わたる　と、　公こう園えん　が　あります。michi o wataru to, kouen ga arimasu.
When you cross the street, there is a park.
この　ボタン　を　押おす　と、　エレベーター　が　動うごきます。kono botan o osu to, erebeetaa ga ugokimasu.
If you press this button, the elevator will move.
日ひ　が　暮くれる　と、　暗くらく　なります。hi ga kureru to, kuraku narimasu.
When the sun sets, it gets dark.
この　道みち　を　まっすぐ　行いく　と、　コンビニ　が　あります。kono michi o massugu iku to, konbini ga arimasu.
If you go straight on this road, there is a convenience store.
雨あめ　が　降ふる　と、　家いえ　で　映えい画が　を　見みます。ame ga furu to, ie de eiga o mimasu.
When it rains, I watch movies at home.
部へ屋や　が　暗くらい　と　怖こわい　です。heya ga kurai to kowai desu.
It is scary if the room is dark.
家いえ　に　帰かえる　と、　父ちち　が　いました。ie ni kaeru to, chichi ga imashita.
When I returned home, my father was there.
早はやく　起おきない　と、　遅おくれます　よ。hayaku okinai to, okuremasu yo.
If you don't get up quickly, you'll be late.
秋あき　に　なる　と　葉は　が　赤あかく　なります。aki ni naru to wa ga akaku narimasu.
The leaves turn red in autumn.
たくさん　食たべる　と　太ふとります　よ。takusan taberu to futorimasu yo.
If you eat a lot, you'll gain weight (I inform you).
運うん動どうしない　と　太ふとります。undoushinai to futorimasu.
If you don't exercise, you'll become fat.
彼かの女じょ　と　一いっ緒しょ　に　いる　と　幸しあわせ　です。kanojo to issho ni iru to shiawase desu.
I feel happy when I’m with her.

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More from this lesson

〜nai to ikenaimou, totemo tsukarete iru. sugu nenai to ikenai.(o)kyaku(san)muzukashiiano sensei no jugyou wa muzukashii desu. shukudai wa nihongo de kakanai to ikenai.okyakusan ga kuru mae ni, soujishinai to ikemasen.tesuto o toranai to ikemasen ka.dame
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“How do verb conjugations work in Japanese?”
Japanese verbs conjugate based on tense, politeness, and mood. For example, the polite present form adds ‑ます to the verb stem, while the past tense uses ‑ました. Unlike English, Japanese verbs don't change based on the subject — the same form works for "I", "you", and "they".

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Nihon-shiki romanizationwatasi ha tyuugoku kara kimasitaHepburn romanizationwatashi wa chuugoku kara kimashita