must despair
Regular verb: despair - despaired- despaired

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must despair
you must despair
she must despair
we must despair
you must despair
they must despair 	I must be despairing
you must be despairing
she must be despairing
we must be despairing
you must be despairing
they must be despairing	I must have despaired
you must have despaired
she must have despaired
we must have despaired
you must have despaired
they must have despaired	I must have been despairing
you must have been despairing
she must have been despairing
we must have been despairing
you must have been despairing
they must have been despairing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't despair
you mustn't despair
she mustn't despair
we mustn't despair
you mustn't despair
they mustn't despair 	I mustn't be despairing
you mustn't be despairing
she mustn't be despairing
we mustn't be despairing
you mustn't be despairing
they mustn't be despairing	I mustn't have despaired
you mustn't have despaired
she mustn't have despaired
we mustn't have despaired
you mustn't have despaired
they mustn't have despaired	I mustn't have been despairing
you mustn't have been despairing
she mustn't have been despairing
we mustn't have been despairing
you mustn't have been despairing
they mustn't have been despairing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I despair?
must you despair?
must she despair?
must we despair?
must you despair?
must they despair? 	must I be despairing?
must you be despairing?
must she be despairing?
must we be despairing?
must you be despairing?
must they be despairing? 	must I have despaired?
must you have despaired?
must she have despaired?
must we have despaired?
must you have despaired?
must they have despaired? 	must I have been despairing?
must you have been despairing?
must she have been despairing?
must we have been despairing?
must you have been despairing?
must they have been despairing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I despair?
mustn't you despair?
mustn't she despair?
mustn't we despair?
mustn't you despair?
mustn't they despair? 	mustn't I be despairing?
mustn't you be despairing?
mustn't she be despairing?
mustn't we be despairing?
mustn't you be despairing?
mustn't they be despairing? 	mustn't I have despaired?
mustn't you have despaired?
mustn't she have despaired?
mustn't we have despaired?
mustn't you have despaired?
mustn't they have despaired? 	mustn't I have been despairing?
mustn't you have been despairing?
mustn't she have been despairing?
mustn't we have been despairing?
mustn't you have been despairing?
mustn't they have been despairing?