I / not work / today
I haven't worked today.
They / not be / in London
They haven't been in London.
She / not sleep / since yesterday
She hasn't slept since yesterday.
It / not rain / for a long time
It hasn't rained for a long time.
He / not meet / my mother
He hasn't met my mother.
We / not plan / our holiday / yet
We haven't planned our holiday yet.
Dave and Pat / not drink / iced tea
Dave and Pat haven't drunk iced tea.