can knock
Regelmä&szlig;iges Verb: knock - knocked- knocked

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I can knock
you can knock
he can knock
we can knock
you can knock
they can knock 	I can be knocking
you can be knocking
he can be knocking
we can be knocking
you can be knocking
they can be knocking	I can have knocked
you can have knocked
he can have knocked
we can have knocked
you can have knocked
they can have knocked	I can have been knocking
you can have been knocking
he can have been knocking
we can have been knocking
you can have been knocking
they can have been knocking	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I cannot knock
you cannot knock
he cannot knock
we cannot knock
you cannot knock
they cannot knock 	I cannot be knocking
you cannot be knocking
he cannot be knocking
we cannot be knocking
you cannot be knocking
they cannot be knocking	I cannot have knocked
you cannot have knocked
he cannot have knocked
we cannot have knocked
you cannot have knocked
they cannot have knocked	I cannot have been knocking
you cannot have been knocking
he cannot have been knocking
we cannot have been knocking
you cannot have been knocking
they cannot have been knocking	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
can I knock?
can you knock?
can he knock?
can we knock?
can you knock?
can they knock? 	can I be knocking?
can you be knocking?
can he be knocking?
can we be knocking?
can you be knocking?
can they be knocking? 	can I have knocked?
can you have knocked?
can he have knocked?
can we have knocked?
can you have knocked?
can they have knocked? 	can I have been knocking?
can you have been knocking?
can he have been knocking?
can we have been knocking?
can you have been knocking?
can they have been knocking? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
can I not knock?
can you not knock?
can he not knock?
can we not knock?
can you not knock?
can they not knock? 	can I not be knocking?
can you not be knocking?
can he not be knocking?
can we not be knocking?
can you not be knocking?
can they not be knocking? 	can I not have knocked?
can you not have knocked?
can he not have knocked?
can we not have knocked?
can you not have knocked?
can they not have knocked? 	can I not have been knocking?
can you not have been knocking?
can he not have been knocking?
can we not have been knocking?
can you not have been knocking?
can they not have been knocking?