must slip
Verbo regular: slip - slipped- slipped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must slip
you must slip
he must slip
we must slip
you must slip
they must slip 	I must be slipping
you must be slipping
he must be slipping
we must be slipping
you must be slipping
they must be slipping	I must have slipped
you must have slipped
he must have slipped
we must have slipped
you must have slipped
they must have slipped	I must have been slipping
you must have been slipping
he must have been slipping
we must have been slipping
you must have been slipping
they must have been slipping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not slip
you must not slip
he must not slip
we must not slip
you must not slip
they must not slip 	I must not be slipping
you must not be slipping
he must not be slipping
we must not be slipping
you must not be slipping
they must not be slipping	I must not have slipped
you must not have slipped
he must not have slipped
we must not have slipped
you must not have slipped
they must not have slipped	I must not have been slipping
you must not have been slipping
he must not have been slipping
we must not have been slipping
you must not have been slipping
they must not have been slipping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I slip?
must you slip?
must he slip?
must we slip?
must you slip?
must they slip? 	must I be slipping?
must you be slipping?
must he be slipping?
must we be slipping?
must you be slipping?
must they be slipping? 	must I have slipped?
must you have slipped?
must he have slipped?
must we have slipped?
must you have slipped?
must they have slipped? 	must I have been slipping?
must you have been slipping?
must he have been slipping?
must we have been slipping?
must you have been slipping?
must they have been slipping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not slip?
must you not slip?
must he not slip?
must we not slip?
must you not slip?
must they not slip? 	must I not be slipping?
must you not be slipping?
must he not be slipping?
must we not be slipping?
must you not be slipping?
must they not be slipping? 	must I not have slipped?
must you not have slipped?
must he not have slipped?
must we not have slipped?
must you not have slipped?
must they not have slipped? 	must I not have been slipping?
must you not have been slipping?
must he not have been slipping?
must we not have been slipping?
must you not have been slipping?
must they not have been slipping?