can knife
Verbo regular: knife - knifed- knifed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can knife
you can knife
he can knife
we can knife
you can knife
they can knife 	I can be knifing
you can be knifing
he can be knifing
we can be knifing
you can be knifing
they can be knifing	I can have knifed
you can have knifed
he can have knifed
we can have knifed
you can have knifed
they can have knifed	I can have been knifing
you can have been knifing
he can have been knifing
we can have been knifing
you can have been knifing
they can have been knifing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't knife
you can't knife
he can't knife
we can't knife
you can't knife
they can't knife 	I can't be knifing
you can't be knifing
he can't be knifing
we can't be knifing
you can't be knifing
they can't be knifing	I can't have knifed
you can't have knifed
he can't have knifed
we can't have knifed
you can't have knifed
they can't have knifed	I can't have been knifing
you can't have been knifing
he can't have been knifing
we can't have been knifing
you can't have been knifing
they can't have been knifing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I knife?
can you knife?
can he knife?
can we knife?
can you knife?
can they knife? 	can I be knifing?
can you be knifing?
can he be knifing?
can we be knifing?
can you be knifing?
can they be knifing? 	can I have knifed?
can you have knifed?
can he have knifed?
can we have knifed?
can you have knifed?
can they have knifed? 	can I have been knifing?
can you have been knifing?
can he have been knifing?
can we have been knifing?
can you have been knifing?
can they have been knifing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I knife?
can't you knife?
can't he knife?
can't we knife?
can't you knife?
can't they knife? 	can't I be knifing?
can't you be knifing?
can't he be knifing?
can't we be knifing?
can't you be knifing?
can't they be knifing? 	can't I have knifed?
can't you have knifed?
can't he have knifed?
can't we have knifed?
can't you have knifed?
can't they have knifed? 	can't I have been knifing?
can't you have been knifing?
can't he have been knifing?
can't we have been knifing?
can't you have been knifing?
can't they have been knifing?