can behave
Regular verb: behave - behaved- behaved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can behave
you can behave
he can behave
we can behave
you can behave
they can behave 	I can be behaving
you can be behaving
he can be behaving
we can be behaving
you can be behaving
they can be behaving	I can have behaved
you can have behaved
he 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
he 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 cannot behave
you cannot behave
he cannot behave
we cannot behave
you cannot behave
they cannot behave 	I cannot be behaving
you cannot be behaving
he cannot be behaving
we cannot be behaving
you cannot be behaving
they cannot be behaving	I cannot have behaved
you cannot have behaved
he cannot have behaved
we cannot have behaved
you cannot have behaved
they cannot have behaved	I cannot have been behaving
you cannot have been behaving
he cannot have been behaving
we cannot have been behaving
you cannot have been behaving
they cannot have been behaving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I behave?
can you behave?
can he behave?
can we behave?
can you behave?
can they behave? 	can I be behaving?
can you be behaving?
can he be behaving?
can we be behaving?
can you be behaving?
can they be behaving? 	can I have behaved?
can you have behaved?
can he 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 he 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 I not behave?
can you not behave?
can he not behave?
can we not behave?
can you not behave?
can they not behave? 	can I not be behaving?
can you not be behaving?
can he not be behaving?
can we not be behaving?
can you not be behaving?
can they not be behaving? 	can I not have behaved?
can you not have behaved?
can he not have behaved?
can we not have behaved?
can you not have behaved?
can they not have behaved? 	can I not have been behaving?
can you not have been behaving?
can he not have been behaving?
can we not have been behaving?
can you not have been behaving?
can they not have been behaving?