must sip
Verbo regular: sip - sipped- sipped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must sip
you must sip
he must sip
we must sip
you must sip
they must sip 	I must be sipping
you must be sipping
he must be sipping
we must be sipping
you must be sipping
they must be sipping	I must have sipped
you must have sipped
he must have sipped
we must have sipped
you must have sipped
they must have sipped	I must have been sipping
you must have been sipping
he must have been sipping
we must have been sipping
you must have been sipping
they must have been sipping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not sip
you must not sip
he must not sip
we must not sip
you must not sip
they must not sip 	I must not be sipping
you must not be sipping
he must not be sipping
we must not be sipping
you must not be sipping
they must not be sipping	I must not have sipped
you must not have sipped
he must not have sipped
we must not have sipped
you must not have sipped
they must not have sipped	I must not have been sipping
you must not have been sipping
he must not have been sipping
we must not have been sipping
you must not have been sipping
they must not have been sipping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I sip?
must you sip?
must he sip?
must we sip?
must you sip?
must they sip? 	must I be sipping?
must you be sipping?
must he be sipping?
must we be sipping?
must you be sipping?
must they be sipping? 	must I have sipped?
must you have sipped?
must he have sipped?
must we have sipped?
must you have sipped?
must they have sipped? 	must I have been sipping?
must you have been sipping?
must he have been sipping?
must we have been sipping?
must you have been sipping?
must they have been sipping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not sip?
must you not sip?
must he not sip?
must we not sip?
must you not sip?
must they not sip? 	must I not be sipping?
must you not be sipping?
must he not be sipping?
must we not be sipping?
must you not be sipping?
must they not be sipping? 	must I not have sipped?
must you not have sipped?
must he not have sipped?
must we not have sipped?
must you not have sipped?
must they not have sipped? 	must I not have been sipping?
must you not have been sipping?
must he not have been sipping?
must we not have been sipping?
must you not have been sipping?
must they not have been sipping?