may sweeten
Regular verb: sweeten - sweetened- sweetened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may sweeten
you may sweeten
she may sweeten
we may sweeten
you may sweeten
they may sweeten 	I may be sweetening
you may be sweetening
she may be sweetening
we may be sweetening
you may be sweetening
they may be sweetening	I may have sweetened
you may have sweetened
she may have sweetened
we may have sweetened
you may have sweetened
they may have sweetened	I may have been sweetening
you may have been sweetening
she may have been sweetening
we may have been sweetening
you may have been sweetening
they may have been sweetening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not sweeten
you may not sweeten
she may not sweeten
we may not sweeten
you may not sweeten
they may not sweeten 	I may not be sweetening
you may not be sweetening
she may not be sweetening
we may not be sweetening
you may not be sweetening
they may not be sweetening	I may not have sweetened
you may not have sweetened
she may not have sweetened
we may not have sweetened
you may not have sweetened
they may not have sweetened	I may not have been sweetening
you may not have been sweetening
she may not have been sweetening
we may not have been sweetening
you may not have been sweetening
they may not have been sweetening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I sweeten?
may you sweeten?
may she sweeten?
may we sweeten?
may you sweeten?
may they sweeten? 	may I be sweetening?
may you be sweetening?
may she be sweetening?
may we be sweetening?
may you be sweetening?
may they be sweetening? 	may I have sweetened?
may you have sweetened?
may she have sweetened?
may we have sweetened?
may you have sweetened?
may they have sweetened? 	may I have been sweetening?
may you have been sweetening?
may she have been sweetening?
may we have been sweetening?
may you have been sweetening?
may they have been sweetening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not sweeten?
may you not sweeten?
may she not sweeten?
may we not sweeten?
may you not sweeten?
may they not sweeten? 	may I not be sweetening?
may you not be sweetening?
may she not be sweetening?
may we not be sweetening?
may you not be sweetening?
may they not be sweetening? 	may I not have sweetened?
may you not have sweetened?
may she not have sweetened?
may we not have sweetened?
may you not have sweetened?
may they not have sweetened? 	may I not have been sweetening?
may you not have been sweetening?
may she not have been sweetening?
may we not have been sweetening?
may you not have been sweetening?
may they not have been sweetening?