`when` in Latin

when

1. adverb
   • at what time something happens
     
     quando

     When did you arrive? — Quando advenisti?
2. conjunction
   • at the time that something happens
     
     cum

     I was sleeping when he called. — Dormiebam cum ille vocavit.
3. relative pronoun
   • refers to a time previously mentioned
     
     quo tempore

     The day when we met was sunny. — Dies quo tempore convenimus erat serenus.
4. interjection
   • [exclamatory], used to express surprise or emphasis
     
     quando [exclamatory]

     When! I never expected that! — Quando! Id numquam exspectavi!