can attain
Regular verb: attain - attained- attained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can attain
you can attain
he can attain
we can attain
you can attain
they can attain 	I can be attaining
you can be attaining
he can be attaining
we can be attaining
you can be attaining
they can be attaining	I can have attained
you can have attained
he can have attained
we can have attained
you can have attained
they can have attained	I can have been attaining
you can have been attaining
he can have been attaining
we can have been attaining
you can have been attaining
they can have been attaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't attain
you can't attain
he can't attain
we can't attain
you can't attain
they can't attain 	I can't be attaining
you can't be attaining
he can't be attaining
we can't be attaining
you can't be attaining
they can't be attaining	I can't have attained
you can't have attained
he can't have attained
we can't have attained
you can't have attained
they can't have attained	I can't have been attaining
you can't have been attaining
he can't have been attaining
we can't have been attaining
you can't have been attaining
they can't have been attaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I attain?
can you attain?
can he attain?
can we attain?
can you attain?
can they attain? 	can I be attaining?
can you be attaining?
can he be attaining?
can we be attaining?
can you be attaining?
can they be attaining? 	can I have attained?
can you have attained?
can he have attained?
can we have attained?
can you have attained?
can they have attained? 	can I have been attaining?
can you have been attaining?
can he have been attaining?
can we have been attaining?
can you have been attaining?
can they have been attaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I attain?
can't you attain?
can't he attain?
can't we attain?
can't you attain?
can't they attain? 	can't I be attaining?
can't you be attaining?
can't he be attaining?
can't we be attaining?
can't you be attaining?
can't they be attaining? 	can't I have attained?
can't you have attained?
can't he have attained?
can't we have attained?
can't you have attained?
can't they have attained? 	can't I have been attaining?
can't you have been attaining?
can't he have been attaining?
can't we have been attaining?
can't you have been attaining?
can't they have been attaining?