Must
I knew something must be wrong when I overtook a second bus with the same number as one I'd already past.
If someone must smoke on the road, stop at a rest stop for a smoke break outside the car.
There's a lot to be said for due process - but in this case we must insist as a country that the rules can sometimes be wrong.
a big old bull elephant in must
Deciding what public benefit means must , she insisted, be left to the Charity Commission.
Mustn't
But we mustn't let this sense of outrage be turned against innocent people.
We mustn't , he stated, forget where we come from in this rapidly changing world.
I'm not arguing the university mustn't change and expand, but I think there's better ways to do it.
She said I mustn't wear it too much at first so that Dad didn't notice and get angry.
I'm a staunch believer in the old idea that one mustn't bottle up one's emotions.
Can't
You can't find this information on the Internet.
He can’t be so old.