Explanation
Express that something cannot be done without meeting a certain condition.
Formation
Verb-ない + ことには + Verb-ない
Detailed explanation
The ないことには grammar point is used to indicate that something cannot be done or achieved unless a certain condition is met. This pattern is formed by attaching ないことには to the negative form of a verb, followed by a negative outcome statement. It often appears as V-ない + ことには + V-ない or a negative expression.
Examples
Kusuri o nomanai koto ni wa, byōki ga naoranai.
Unless you take the medicine, the illness won't get better.
Kono mondai ni yoku kangaenai koto ni wa, kaiketsu dekinai.
Unless you think carefully about this problem, you can't solve it.
Renshū o shinai koto ni wa, sukiru ga jōtatsu shinai.
Unless you practice, your skills won't improve.
Tetsuzuki o shinai koto ni wa, atarashii pasupōto ga moraenai.
Unless you go through the procedures, you can't get a new passport.
Practice
Grammar content sourced from hanabira.org.