can quack
Verbo regolare: quack - quacked- quacked

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I can quack
you can quack
he can quack
we can quack
you can quack
they can quack 	I can be quacking
you can be quacking
he can be quacking
we can be quacking
you can be quacking
they can be quacking	I can have quacked
you can have quacked
he can have quacked
we can have quacked
you can have quacked
they can have quacked	I can have been quacking
you can have been quacking
he can have been quacking
we can have been quacking
you can have been quacking
they can have been quacking	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I can't quack
you can't quack
he can't quack
we can't quack
you can't quack
they can't quack 	I can't be quacking
you can't be quacking
he can't be quacking
we can't be quacking
you can't be quacking
they can't be quacking	I can't have quacked
you can't have quacked
he can't have quacked
we can't have quacked
you can't have quacked
they can't have quacked	I can't have been quacking
you can't have been quacking
he can't have been quacking
we can't have been quacking
you can't have been quacking
they can't have been quacking	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
can I quack?
can you quack?
can he quack?
can we quack?
can you quack?
can they quack? 	can I be quacking?
can you be quacking?
can he be quacking?
can we be quacking?
can you be quacking?
can they be quacking? 	can I have quacked?
can you have quacked?
can he have quacked?
can we have quacked?
can you have quacked?
can they have quacked? 	can I have been quacking?
can you have been quacking?
can he have been quacking?
can we have been quacking?
can you have been quacking?
can they have been quacking? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
can't I quack?
can't you quack?
can't he quack?
can't we quack?
can't you quack?
can't they quack? 	can't I be quacking?
can't you be quacking?
can't he be quacking?
can't we be quacking?
can't you be quacking?
can't they be quacking? 	can't I have quacked?
can't you have quacked?
can't he have quacked?
can't we have quacked?
can't you have quacked?
can't they have quacked? 	can't I have been quacking?
can't you have been quacking?
can't he have been quacking?
can't we have been quacking?
can't you have been quacking?
can't they have been quacking?