must buffer
Verbo regular: buffer - buffered- buffered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must buffer
you must buffer
she must buffer
we must buffer
you must buffer
they must buffer 	I must be buffering
you must be buffering
she must be buffering
we must be buffering
you must be buffering
they must be buffering	I must have buffered
you must have buffered
she must have buffered
we must have buffered
you must have buffered
they must have buffered	I must have been buffering
you must have been buffering
she must have been buffering
we must have been buffering
you must have been buffering
they must have been buffering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not buffer
you must not buffer
she must not buffer
we must not buffer
you must not buffer
they must not buffer 	I must not be buffering
you must not be buffering
she must not be buffering
we must not be buffering
you must not be buffering
they must not be buffering	I must not have buffered
you must not have buffered
she must not have buffered
we must not have buffered
you must not have buffered
they must not have buffered	I must not have been buffering
you must not have been buffering
she must not have been buffering
we must not have been buffering
you must not have been buffering
they must not have been buffering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I buffer?
must you buffer?
must she buffer?
must we buffer?
must you buffer?
must they buffer? 	must I be buffering?
must you be buffering?
must she be buffering?
must we be buffering?
must you be buffering?
must they be buffering? 	must I have buffered?
must you have buffered?
must she have buffered?
must we have buffered?
must you have buffered?
must they have buffered? 	must I have been buffering?
must you have been buffering?
must she have been buffering?
must we have been buffering?
must you have been buffering?
must they have been buffering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not buffer?
must you not buffer?
must she not buffer?
must we not buffer?
must you not buffer?
must they not buffer? 	must I not be buffering?
must you not be buffering?
must she not be buffering?
must we not be buffering?
must you not be buffering?
must they not be buffering? 	must I not have buffered?
must you not have buffered?
must she not have buffered?
must we not have buffered?
must you not have buffered?
must they not have buffered? 	must I not have been buffering?
must you not have been buffering?
must she not have been buffering?
must we not have been buffering?
must you not have been buffering?
must they not have been buffering?