when
Translation
when
Examples
When is your birthday?
When is your birthday?
Call me when you arrive.
Call me when you arrive.
I was young when it happened.
I was young when it happened.
Grammar Patterns
((adverb)) at what time When does the train leave?
((conjunction)) at the time that I will call you when I get home.
Similar Words
Synonyms (as a conjunction): while, as
Etymology
From Old English 'hwenne'. Related to other 'wh-' question words like 'what' and 'where'.
Memory Tips
Think of a clock and a question mark. 'When?' asks for a point in time.