夕食後は外出してはいけません。

夕食後は外出してはいけません。

You must not go out after dinner.

夕食後(ゆうしょくご)は外出(がいしゅつ)してはいけません。

Yūshokugo wa gaishutsushite waikemasen.

夕食後 (ゆうしょくご)

after dinner

は (は)

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

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: セキ、ゆう

Meaning: evening

Readings: ショク、ジキ、く.う、く.らう、た.べる、は.む

Meanings: eat, food

Readings: ゴ、コウ、のち、うし.ろ、うしろ、あと、おく.れる

Meanings: behind, back, later

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