must sweeten
Verbo regular: sweeten - sweetened- sweetened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must sweeten
you must sweeten
he must sweeten
we must sweeten
you must sweeten
they must sweeten 	I must be sweetening
you must be sweetening
he must be sweetening
we must be sweetening
you must be sweetening
they must be sweetening	I must have sweetened
you must have sweetened
he must have sweetened
we must have sweetened
you must have sweetened
they must have sweetened	I must have been sweetening
you must have been sweetening
he must have been sweetening
we must have been sweetening
you must have been sweetening
they must have been sweetening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not sweeten
you must not sweeten
he must not sweeten
we must not sweeten
you must not sweeten
they must not sweeten 	I must not be sweetening
you must not be sweetening
he must not be sweetening
we must not be sweetening
you must not be sweetening
they must not be sweetening	I must not have sweetened
you must not have sweetened
he must not have sweetened
we must not have sweetened
you must not have sweetened
they must not have sweetened	I must not have been sweetening
you must not have been sweetening
he must not have been sweetening
we must not have been sweetening
you must not have been sweetening
they must not have been sweetening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I sweeten?
must you sweeten?
must he sweeten?
must we sweeten?
must you sweeten?
must they sweeten? 	must I be sweetening?
must you be sweetening?
must he be sweetening?
must we be sweetening?
must you be sweetening?
must they be sweetening? 	must I have sweetened?
must you have sweetened?
must he have sweetened?
must we have sweetened?
must you have sweetened?
must they have sweetened? 	must I have been sweetening?
must you have been sweetening?
must he have been sweetening?
must we have been sweetening?
must you have been sweetening?
must they have been sweetening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not sweeten?
must you not sweeten?
must he not sweeten?
must we not sweeten?
must you not sweeten?
must they not sweeten? 	must I not be sweetening?
must you not be sweetening?
must he not be sweetening?
must we not be sweetening?
must you not be sweetening?
must they not be sweetening? 	must I not have sweetened?
must you not have sweetened?
must he not have sweetened?
must we not have sweetened?
must you not have sweetened?
must they not have sweetened? 	must I not have been sweetening?
must you not have been sweetening?
must he not have been sweetening?
must we not have been sweetening?
must you not have been sweetening?
must they not have been sweetening?