He must know several foreign languages.
He must be working on his new novel now.
They must be enjoying fine weather now.
She must be trying to find the old letters.
They must be admiring the beauty of the southern nature.
He must have returned from the south.
She must have lost my address.
They must have finished their work.
He must have told everything at the trial.
She must have prepared everything beforehand.
He must be still here.
They must have just come.
He must have carried the papers away.
Somebody must have already been here.
They must be laughing at him.
They must have lived here then.
It must be raining.
It must be here.
He must be right.