can worsen
Regular verb: worsen - worsened- worsened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can worsen
you can worsen
he can worsen
we can worsen
you can worsen
they can worsen 	I can be worsening
you can be worsening
he can be worsening
we can be worsening
you can be worsening
they can be worsening	I can have worsened
you can have worsened
he can have worsened
we can have worsened
you can have worsened
they can have worsened	I can have been worsening
you can have been worsening
he can have been worsening
we can have been worsening
you can have been worsening
they can have been worsening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't worsen
you can't worsen
he can't worsen
we can't worsen
you can't worsen
they can't worsen 	I can't be worsening
you can't be worsening
he can't be worsening
we can't be worsening
you can't be worsening
they can't be worsening	I can't have worsened
you can't have worsened
he can't have worsened
we can't have worsened
you can't have worsened
they can't have worsened	I can't have been worsening
you can't have been worsening
he can't have been worsening
we can't have been worsening
you can't have been worsening
they can't have been worsening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I worsen?
can you worsen?
can he worsen?
can we worsen?
can you worsen?
can they worsen? 	can I be worsening?
can you be worsening?
can he be worsening?
can we be worsening?
can you be worsening?
can they be worsening? 	can I have worsened?
can you have worsened?
can he have worsened?
can we have worsened?
can you have worsened?
can they have worsened? 	can I have been worsening?
can you have been worsening?
can he have been worsening?
can we have been worsening?
can you have been worsening?
can they have been worsening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I worsen?
can't you worsen?
can't he worsen?
can't we worsen?
can't you worsen?
can't they worsen? 	can't I be worsening?
can't you be worsening?
can't he be worsening?
can't we be worsening?
can't you be worsening?
can't they be worsening? 	can't I have worsened?
can't you have worsened?
can't he have worsened?
can't we have worsened?
can't you have worsened?
can't they have worsened? 	can't I have been worsening?
can't you have been worsening?
can't he have been worsening?
can't we have been worsening?
can't you have been worsening?
can't they have been worsening?