後をつけろ。
Words
後
(あと)
behind; rear; after; later; after one's death; remainder; the rest; descendant; successor; heir; past; previous; more (e.g. five more minutes); left
を
(を)
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
点ける
(つける)
to turn on; to switch on; to light up
Kanji
Readings: ゴ、 コウ、 のち、 うし.ろ、 うしろ、 あと、 おく.れる
Meanings: behind, back, later