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 cannot ache
you cannot ache
she cannot ache
we cannot ache
you cannot ache
they cannot ache 	I cannot be aching
you cannot be aching
she cannot be aching
we cannot be aching
you cannot be aching
they cannot be aching	I cannot have ached
you cannot have ached
she cannot have ached
we cannot have ached
you cannot have ached
they cannot have ached	I cannot have been aching
you cannot have been aching
she cannot have been aching
we cannot have been aching
you cannot have been aching
they cannot 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 I not ache?
can you not ache?
can she not ache?
can we not ache?
can you not ache?
can they not ache? 	can I not be aching?
can you not be aching?
can she not be aching?
can we not be aching?
can you not be aching?
can they not be aching? 	can I not have ached?
can you not have ached?
can she not have ached?
can we not have ached?
can you not have ached?
can they not have ached? 	can I not have been aching?
can you not have been aching?
can she not have been aching?
can we not have been aching?
can you not have been aching?
can they not have been aching?