I know you're tired, but try ...
It's difficult...
In some countries, it's important ...
Be ready...
We were late, so Tomo offered...
Do we need...
... not to fall asleep during the movie!
... to dress correctly in public.
...to change our money at the airport?
... not to forget people's names in a big class.
to drive us to the train station.
...to show your passport at check-in.