Is 'To Sleep' Separable or Inseparable? - Phrasal Verb Quiz

Quiz for Verb: 'To sleep'

Is the phrasal verb 'sleep' separable or inseparable in the following examples?

'Sleep over' - Spend the night at someone else's house

'Sleep in' - Sleep longer than usual

'Sleep on' - Think about something

'Sleep off' - Sleep in order to recover from excess alcohol, drugs, etc.

'Sleep through' - Not wake up