may singe
Regular verb: singe - singed- singed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may singe
you may singe
she may singe
we may singe
you may singe
they may singe 	I may be singing
you may be singing
she may be singing
we may be singing
you may be singing
they may be singing	I may have singed
you may have singed
she may have singed
we may have singed
you may have singed
they may have singed	I may have been singing
you may have been singing
she may have been singing
we may have been singing
you may have been singing
they may have been singing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not singe
you may not singe
she may not singe
we may not singe
you may not singe
they may not singe 	I may not be singing
you may not be singing
she may not be singing
we may not be singing
you may not be singing
they may not be singing	I may not have singed
you may not have singed
she may not have singed
we may not have singed
you may not have singed
they may not have singed	I may not have been singing
you may not have been singing
she may not have been singing
we may not have been singing
you may not have been singing
they may not have been singing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I singe?
may you singe?
may she singe?
may we singe?
may you singe?
may they singe? 	may I be singing?
may you be singing?
may she be singing?
may we be singing?
may you be singing?
may they be singing? 	may I have singed?
may you have singed?
may she have singed?
may we have singed?
may you have singed?
may they have singed? 	may I have been singing?
may you have been singing?
may she have been singing?
may we have been singing?
may you have been singing?
may they have been singing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not singe?
may you not singe?
may she not singe?
may we not singe?
may you not singe?
may they not singe? 	may I not be singing?
may you not be singing?
may she not be singing?
may we not be singing?
may you not be singing?
may they not be singing? 	may I not have singed?
may you not have singed?
may she not have singed?
may we not have singed?
may you not have singed?
may they not have singed? 	may I not have been singing?
may you not have been singing?
may she not have been singing?
may we not have been singing?
may you not have been singing?
may they not have been singing?