出席しなくてはいけないよ。

出席しなくてはいけないよ。

You ought not to miss it.

出席(しゅっせき)しなくてはいけないよ。

Shussekishinakute waikenai yo.

出席 (しゅっせき)

attendance; presence; appearance; to attend; to be present; to appear

ば (ば)

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

よ (よ)

indicates certainty, emphasis, contempt, request, etc.; used when calling out to someone; used to catch one's breath or get someone's attention; yo!

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

Readings: セキ、むしろ

Meanings: seat, mat, occasion, place