除非

chúfēi

HSK 6

除非 — chúfēi

1. only if; unless (introduces the sole condition under which something will happen)

   我不会去，除非你来邀请我。 wǒ búhuì qù chúfēi nǐ lái yāoqǐng wǒ — I won't go unless you invite me.