can convulse
Regular verb: convulse - convulsed- convulsed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can convulse
you can convulse
she can convulse
we can convulse
you can convulse
they can convulse 	I can be convulsing
you can be convulsing
she can be convulsing
we can be convulsing
you can be convulsing
they can be convulsing	I can have convulsed
you can have convulsed
she can have convulsed
we can have convulsed
you can have convulsed
they can have convulsed	I can have been convulsing
you can have been convulsing
she can have been convulsing
we can have been convulsing
you can have been convulsing
they can have been convulsing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't convulse
you can't convulse
she can't convulse
we can't convulse
you can't convulse
they can't convulse 	I can't be convulsing
you can't be convulsing
she can't be convulsing
we can't be convulsing
you can't be convulsing
they can't be convulsing	I can't have convulsed
you can't have convulsed
she can't have convulsed
we can't have convulsed
you can't have convulsed
they can't have convulsed	I can't have been convulsing
you can't have been convulsing
she can't have been convulsing
we can't have been convulsing
you can't have been convulsing
they can't have been convulsing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I convulse?
can you convulse?
can she convulse?
can we convulse?
can you convulse?
can they convulse? 	can I be convulsing?
can you be convulsing?
can she be convulsing?
can we be convulsing?
can you be convulsing?
can they be convulsing? 	can I have convulsed?
can you have convulsed?
can she have convulsed?
can we have convulsed?
can you have convulsed?
can they have convulsed? 	can I have been convulsing?
can you have been convulsing?
can she have been convulsing?
can we have been convulsing?
can you have been convulsing?
can they have been convulsing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I convulse?
can't you convulse?
can't she convulse?
can't we convulse?
can't you convulse?
can't they convulse? 	can't I be convulsing?
can't you be convulsing?
can't she be convulsing?
can't we be convulsing?
can't you be convulsing?
can't they be convulsing? 	can't I have convulsed?
can't you have convulsed?
can't she have convulsed?
can't we have convulsed?
can't you have convulsed?
can't they have convulsed? 	can't I have been convulsing?
can't you have been convulsing?
can't she have been convulsing?
can't we have been convulsing?
can't you have been convulsing?
can't they have been convulsing?