Breakdown of ie o deru mae ni, doa ni kagi o kakemasu.
Questions & Answers about ie o deru mae ni, doa ni kagi o kakemasu.
Because 出る is modifying 前 in the pattern Verb + 前に, which means before doing ....
When a verb comes before a noun-like word such as 前, it normally appears in its plain form:
- 家を出る前に = before leaving the house
Using 出ます前に would be ungrammatical.
This is similar to how plain-form verbs are used before nouns in other structures too.
Dictionary form verb + 前に means before doing something.
So:
- 家を出る前に = before leaving the house
A useful comparison:
- 食べる前に = before eating
- 寝る前に = before sleeping
- 行く前に = before going
The verb stays in the dictionary form because the action has not happened yet.
