食べるときは口を閉じて

Meaning
close your mouth when you eat

Vocab used in this sentence

食べる
eat, consume, ingest, eaters, subsist
とき
when, time, moment, occasion, ibis
a, the, is, am, are, will
mouth, bite, vent, lips, opening, entrance, uttered, orifice
o, the, to, wo
閉じる
close, shut, end, conclude, dismiss
the, it, have