#131: Don't do this lest...
kei, kaua... kei, tūpato kei
Kaua e is used for direct prohibitions (e.g. Kaua e oma – don’t run). Kei is used for warnings about possible consequences (e.g. Kei hinga – don’t fall). Kei te marks present tense, but kei alone signals warning. Often used in phrases like kia tūpato kei… or alongside kaua e to express “lest.”