Word
電気ショック が 必要な とき、 AED が 音声案内 を する。denkishokku ga hitsuyouna toki, AED ga onseiannai o suru.
Meaning
When a shock is needed, the AED gives voice guidance.
Part of speech
sentence
Pronunciation
Course
Breakdown of denkishokku ga hitsuyouna toki, AED ga onseiannai o suru.
をo
direct object particle
がga
subject particle
するsuru
to do
ときtoki
when
Questions & Answers about denkishokku ga hitsuyouna toki, AED ga onseiannai o suru.
Why is 必要 followed by な in 必要なとき?
Because 必要 is a na-adjective.
In Japanese, a na-adjective takes な when it comes directly before a noun. Here, the noun is とき meaning time.
So:
- 必要 = necessary
- 必要なとき = the time when it is necessary
- more naturally: when it is necessary
That is why it is 必要なとき, not 必要とき.
Why is が used after 電気ショック?
In the pattern X が 必要, が marks the thing that is needed.
So:
- 電気ショックが必要 = an electric shock is necessary / an electric shock is needed
This is a very common pattern in Japanese:
- お金が必要です = Money is necessary.
- 時間が必要です = Time is needed.
So here, 電気ショック is the thing that is necessary, which is why it takes が.
How does とき mean when here?
