can ache
Regular verb: ache - ached- ached

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can ache
you can ache
she can ache
we can ache
you can ache
they can ache 	I can be aching
you can be aching
she can be aching
we can be aching
you can be aching
they can be aching	I can have ached
you can have ached
she can have ached
we can have ached
you can have ached
they can have ached	I can have been aching
you can have been aching
she can have been aching
we can have been aching
you can have been aching
they can have been aching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't ache
you can't ache
she can't ache
we can't ache
you can't ache
they can't ache 	I can't be aching
you can't be aching
she can't be aching
we can't be aching
you can't be aching
they can't be aching	I can't have ached
you can't have ached
she can't have ached
we can't have ached
you can't have ached
they can't have ached	I can't have been aching
you can't have been aching
she can't have been aching
we can't have been aching
you can't have been aching
they can't have been aching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I ache?
can you ache?
can she ache?
can we ache?
can you ache?
can they ache? 	can I be aching?
can you be aching?
can she be aching?
can we be aching?
can you be aching?
can they be aching? 	can I have ached?
can you have ached?
can she have ached?
can we have ached?
can you have ached?
can they have ached? 	can I have been aching?
can you have been aching?
can she have been aching?
can we have been aching?
can you have been aching?
can they have been aching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I ache?
can't you ache?
can't she ache?
can't we ache?
can't you ache?
can't they ache? 	can't I be aching?
can't you be aching?
can't she be aching?
can't we be aching?
can't you be aching?
can't they be aching? 	can't I have ached?
can't you have ached?
can't she have ached?
can't we have ached?
can't you have ached?
can't they have ached? 	can't I have been aching?
can't you have been aching?
can't she have been aching?
can't we have been aching?
can't you have been aching?
can't they have been aching?