急がないと遅れますよ。

to hurry; to rush; to hasten; to make something happen sooner

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

to be late; to be delayed; to fall behind schedule; to be overdue

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