can better
Regular verb: better - bettered- bettered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can better
you can better
she can better
we can better
you can better
they can better 	I can be bettering
you can be bettering
she can be bettering
we can be bettering
you can be bettering
they can be bettering	I can have bettered
you can have bettered
she can have bettered
we can have bettered
you can have bettered
they can have bettered	I can have been bettering
you can have been bettering
she can have been bettering
we can have been bettering
you can have been bettering
they can have been bettering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't better
you can't better
she can't better
we can't better
you can't better
they can't better 	I can't be bettering
you can't be bettering
she can't be bettering
we can't be bettering
you can't be bettering
they can't be bettering	I can't have bettered
you can't have bettered
she can't have bettered
we can't have bettered
you can't have bettered
they can't have bettered	I can't have been bettering
you can't have been bettering
she can't have been bettering
we can't have been bettering
you can't have been bettering
they can't have been bettering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I better?
can you better?
can she better?
can we better?
can you better?
can they better? 	can I be bettering?
can you be bettering?
can she be bettering?
can we be bettering?
can you be bettering?
can they be bettering? 	can I have bettered?
can you have bettered?
can she have bettered?
can we have bettered?
can you have bettered?
can they have bettered? 	can I have been bettering?
can you have been bettering?
can she have been bettering?
can we have been bettering?
can you have been bettering?
can they have been bettering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I better?
can't you better?
can't she better?
can't we better?
can't you better?
can't they better? 	can't I be bettering?
can't you be bettering?
can't she be bettering?
can't we be bettering?
can't you be bettering?
can't they be bettering? 	can't I have bettered?
can't you have bettered?
can't she have bettered?
can't we have bettered?
can't you have bettered?
can't they have bettered? 	can't I have been bettering?
can't you have been bettering?
can't she have been bettering?
can't we have been bettering?
can't you have been bettering?
can't they have been bettering?