may quack
Verbo regular: quack - quacked- quacked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may quack
you may quack
he may quack
we may quack
you may quack
they may quack 	I may be quacking
you may be quacking
he may be quacking
we may be quacking
you may be quacking
they may be quacking	I may have quacked
you may have quacked
he may have quacked
we may have quacked
you may have quacked
they may have quacked	I may have been quacking
you may have been quacking
he may have been quacking
we may have been quacking
you may have been quacking
they may have been quacking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may not quack
you may not quack
he may not quack
we may not quack
you may not quack
they may not quack 	I may not be quacking
you may not be quacking
he may not be quacking
we may not be quacking
you may not be quacking
they may not be quacking	I may not have quacked
you may not have quacked
he may not have quacked
we may not have quacked
you may not have quacked
they may not have quacked	I may not have been quacking
you may not have been quacking
he may not have been quacking
we may not have been quacking
you may not have been quacking
they may not have been quacking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I quack?
may you quack?
may he quack?
may we quack?
may you quack?
may they quack? 	may I be quacking?
may you be quacking?
may he be quacking?
may we be quacking?
may you be quacking?
may they be quacking? 	may I have quacked?
may you have quacked?
may he have quacked?
may we have quacked?
may you have quacked?
may they have quacked? 	may I have been quacking?
may you have been quacking?
may he have been quacking?
may we have been quacking?
may you have been quacking?
may they have been quacking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I not quack?
may you not quack?
may he not quack?
may we not quack?
may you not quack?
may they not quack? 	may I not be quacking?
may you not be quacking?
may he not be quacking?
may we not be quacking?
may you not be quacking?
may they not be quacking? 	may I not have quacked?
may you not have quacked?
may he not have quacked?
may we not have quacked?
may you not have quacked?
may they not have quacked? 	may I not have been quacking?
may you not have been quacking?
may he not have been quacking?
may we not have been quacking?
may you not have been quacking?
may they not have been quacking?