YOU SAID:

When I need a weapon: I need a weapon (this is me when I need a weapon)

INTO JAPANESE

武器が必要な時：武器が必要です（武器が必要な時はこれです）

BACK INTO ENGLISH

When you need weapons: weapons are necessary (this is when you need weapons)

INTO JAPANESE

あなたが武器を必要とする時：武器が必要です（これはあなたが武器を必要とする時です）

BACK INTO ENGLISH

When you need weapons: you need weapons (this is when you need weapons)

INTO JAPANESE

あなたが武器を必要とする時：あなたは武器を必要とします（これはあなたが武器を必要とする時です）

BACK INTO ENGLISH

When you need weapons: you need weapons (this is when you need weapons)