can behave
Regular verb: behave - behaved- behaved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can behave
you can behave
she can behave
we can behave
you can behave
they can behave 	I can be behaving
you can be behaving
she can be behaving
we can be behaving
you can be behaving
they can be behaving	I can have behaved
you can have behaved
she can have behaved
we can have behaved
you can have behaved
they can have behaved	I can have been behaving
you can have been behaving
she can have been behaving
we can have been behaving
you can have been behaving
they can have been behaving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't behave
you can't behave
she can't behave
we can't behave
you can't behave
they can't behave 	I can't be behaving
you can't be behaving
she can't be behaving
we can't be behaving
you can't be behaving
they can't be behaving	I can't have behaved
you can't have behaved
she can't have behaved
we can't have behaved
you can't have behaved
they can't have behaved	I can't have been behaving
you can't have been behaving
she can't have been behaving
we can't have been behaving
you can't have been behaving
they can't have been behaving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I behave?
can you behave?
can she behave?
can we behave?
can you behave?
can they behave? 	can I be behaving?
can you be behaving?
can she be behaving?
can we be behaving?
can you be behaving?
can they be behaving? 	can I have behaved?
can you have behaved?
can she have behaved?
can we have behaved?
can you have behaved?
can they have behaved? 	can I have been behaving?
can you have been behaving?
can she have been behaving?
can we have been behaving?
can you have been behaving?
can they have been behaving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I behave?
can't you behave?
can't she behave?
can't we behave?
can't you behave?
can't they behave? 	can't I be behaving?
can't you be behaving?
can't she be behaving?
can't we be behaving?
can't you be behaving?
can't they be behaving? 	can't I have behaved?
can't you have behaved?
can't she have behaved?
can't we have behaved?
can't you have behaved?
can't they have behaved? 	can't I have been behaving?
can't you have been behaving?
can't she have been behaving?
can't we have been behaving?
can't you have been behaving?
can't they have been behaving?