あなたは夜外出してはならない。

あなたは夜外出してはならない。

You must not go out at night.

あなたは夜(よる)外出(がいしゅつ)してはならない。

Anata wa yoru gaishutsushite wanaranai.

貴方 (あなた)

you (referring to someone of equal or lower status); dear (what a wife calls a husband)

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

夜 (よる、よ)

evening; night

外出 (がいしゅつ、そとで)

outing; trip; going out

ば (ば)

if ... then; when; and; why don't you...?; the more (one does something); because; since

Readings: ヤ、よ、よる

Meanings: night, evening

Readings: ガイ、ゲ、そと、ほか、はず.す、はず.れる、と-

Meaning: outside

Readings: シュツ、スイ、で.る、 -で、だ.す、 -だ.す、い.でる、い.だす

Meanings: exit, leave, go out, come out, put out, protrude