She may not come 
She can't come 
She mustn't come 
No se

He may win 
He can win 
He must win 
No Answer

It can rain 
It should rain 
It may rain 
No se

He may not pass the exam 
He can't pass the exam 
He mustn't pass the exam 
No se

May I come in? 
Must I come in? 
Do I have to come in? 
No se