can mourn
Regular verb: mourn - mourned- mourned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can mourn
you can mourn
he can mourn
we can mourn
you can mourn
they can mourn 	I can be mourning
you can be mourning
he can be mourning
we can be mourning
you can be mourning
they can be mourning	I can have mourned
you can have mourned
he can have mourned
we can have mourned
you can have mourned
they can have mourned	I can have been mourning
you can have been mourning
he can have been mourning
we can have been mourning
you can have been mourning
they can have been mourning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't mourn
you can't mourn
he can't mourn
we can't mourn
you can't mourn
they can't mourn 	I can't be mourning
you can't be mourning
he can't be mourning
we can't be mourning
you can't be mourning
they can't be mourning	I can't have mourned
you can't have mourned
he can't have mourned
we can't have mourned
you can't have mourned
they can't have mourned	I can't have been mourning
you can't have been mourning
he can't have been mourning
we can't have been mourning
you can't have been mourning
they can't have been mourning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I mourn?
can you mourn?
can he mourn?
can we mourn?
can you mourn?
can they mourn? 	can I be mourning?
can you be mourning?
can he be mourning?
can we be mourning?
can you be mourning?
can they be mourning? 	can I have mourned?
can you have mourned?
can he have mourned?
can we have mourned?
can you have mourned?
can they have mourned? 	can I have been mourning?
can you have been mourning?
can he have been mourning?
can we have been mourning?
can you have been mourning?
can they have been mourning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I mourn?
can't you mourn?
can't he mourn?
can't we mourn?
can't you mourn?
can't they mourn? 	can't I be mourning?
can't you be mourning?
can't he be mourning?
can't we be mourning?
can't you be mourning?
can't they be mourning? 	can't I have mourned?
can't you have mourned?
can't he have mourned?
can't we have mourned?
can't you have mourned?
can't they have mourned? 	can't I have been mourning?
can't you have been mourning?
can't he have been mourning?
can't we have been mourning?
can't you have been mourning?
can't they have been mourning?