N4 — outside your level filter
Is said whole, with nothing composed onto it and takes no だ/です, so there are no forms to conjugate.
鍵をかける
kagiwokakeruto lock a doorN4expression
Example sentences2
出かけるときはちゃんと鍵をかけるんだよ。
dekakeru toki wa chanto kagi o kakeru n da yo.
Make sure you lock the door when you go out. casual
最後に帰る人が事務所の鍵をかけるのが決まりです。
saigo ni kaeru hito ga jimusho no kagi o kakeru no ga kimari desu.
It's the rule that the last person to leave locks up the office. neutral