We use 'until' to say when someone ________ doing something.
stops
You use 'while' to join sentences that are happening...
...at the same time!
'After' is 'glued' to the _________ thing that happens.
first
We use 'since' to say when someone ___________ doing something.
started
'Before' is 'glued' to the _____________ thing that happens.
second