must gibber
Verbo regular: gibber - gibbered- gibbered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must gibber
you must gibber
she must gibber
we must gibber
you must gibber
they must gibber 	I must be gibbering
you must be gibbering
she must be gibbering
we must be gibbering
you must be gibbering
they must be gibbering	I must have gibbered
you must have gibbered
she must have gibbered
we must have gibbered
you must have gibbered
they must have gibbered	I must have been gibbering
you must have been gibbering
she must have been gibbering
we must have been gibbering
you must have been gibbering
they must have been gibbering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not gibber
you must not gibber
she must not gibber
we must not gibber
you must not gibber
they must not gibber 	I must not be gibbering
you must not be gibbering
she must not be gibbering
we must not be gibbering
you must not be gibbering
they must not be gibbering	I must not have gibbered
you must not have gibbered
she must not have gibbered
we must not have gibbered
you must not have gibbered
they must not have gibbered	I must not have been gibbering
you must not have been gibbering
she must not have been gibbering
we must not have been gibbering
you must not have been gibbering
they must not have been gibbering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I gibber?
must you gibber?
must she gibber?
must we gibber?
must you gibber?
must they gibber? 	must I be gibbering?
must you be gibbering?
must she be gibbering?
must we be gibbering?
must you be gibbering?
must they be gibbering? 	must I have gibbered?
must you have gibbered?
must she have gibbered?
must we have gibbered?
must you have gibbered?
must they have gibbered? 	must I have been gibbering?
must you have been gibbering?
must she have been gibbering?
must we have been gibbering?
must you have been gibbering?
must they have been gibbering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not gibber?
must you not gibber?
must she not gibber?
must we not gibber?
must you not gibber?
must they not gibber? 	must I not be gibbering?
must you not be gibbering?
must she not be gibbering?
must we not be gibbering?
must you not be gibbering?
must they not be gibbering? 	must I not have gibbered?
must you not have gibbered?
must she not have gibbered?
must we not have gibbered?
must you not have gibbered?
must they not have gibbered? 	must I not have been gibbering?
must you not have been gibbering?
must she not have been gibbering?
must we not have been gibbering?
must you not have been gibbering?
must they not have been gibbering?