can gibber
Regular verb: gibber - gibbered- gibbered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can gibber
you can gibber
he can gibber
we can gibber
you can gibber
they can gibber 	I can be gibbering
you can be gibbering
he can be gibbering
we can be gibbering
you can be gibbering
they can be gibbering	I can have gibbered
you can have gibbered
he can have gibbered
we can have gibbered
you can have gibbered
they can have gibbered	I can have been gibbering
you can have been gibbering
he can have been gibbering
we can have been gibbering
you can have been gibbering
they can have been gibbering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot gibber
you cannot gibber
he cannot gibber
we cannot gibber
you cannot gibber
they cannot gibber 	I cannot be gibbering
you cannot be gibbering
he cannot be gibbering
we cannot be gibbering
you cannot be gibbering
they cannot be gibbering	I cannot have gibbered
you cannot have gibbered
he cannot have gibbered
we cannot have gibbered
you cannot have gibbered
they cannot have gibbered	I cannot have been gibbering
you cannot have been gibbering
he cannot have been gibbering
we cannot have been gibbering
you cannot have been gibbering
they cannot have been gibbering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I gibber?
can you gibber?
can he gibber?
can we gibber?
can you gibber?
can they gibber? 	can I be gibbering?
can you be gibbering?
can he be gibbering?
can we be gibbering?
can you be gibbering?
can they be gibbering? 	can I have gibbered?
can you have gibbered?
can he have gibbered?
can we have gibbered?
can you have gibbered?
can they have gibbered? 	can I have been gibbering?
can you have been gibbering?
can he have been gibbering?
can we have been gibbering?
can you have been gibbering?
can they have been gibbering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not gibber?
can you not gibber?
can he not gibber?
can we not gibber?
can you not gibber?
can they not gibber? 	can I not be gibbering?
can you not be gibbering?
can he not be gibbering?
can we not be gibbering?
can you not be gibbering?
can they not be gibbering? 	can I not have gibbered?
can you not have gibbered?
can he not have gibbered?
can we not have gibbered?
can you not have gibbered?
can they not have gibbered? 	can I not have been gibbering?
can you not have been gibbering?
can he not have been gibbering?
can we not have been gibbering?
can you not have been gibbering?
can they not have been gibbering?