should knife
Verbo regular: knife - knifed- knifed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should knife
you should knife
she should knife
we should knife
you should knife
they should knife 	I should be knifing
you should be knifing
she should be knifing
we should be knifing
you should be knifing
they should be knifing	I should have knifed
you should have knifed
she should have knifed
we should have knifed
you should have knifed
they should have knifed	I should have been knifing
you should have been knifing
she should have been knifing
we should have been knifing
you should have been knifing
they should have been knifing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not knife
you should not knife
she should not knife
we should not knife
you should not knife
they should not knife 	I should not be knifing
you should not be knifing
she should not be knifing
we should not be knifing
you should not be knifing
they should not be knifing	I should not have knifed
you should not have knifed
she should not have knifed
we should not have knifed
you should not have knifed
they should not have knifed	I should not have been knifing
you should not have been knifing
she should not have been knifing
we should not have been knifing
you should not have been knifing
they should not have been knifing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I knife?
should you knife?
should she knife?
should we knife?
should you knife?
should they knife? 	should I be knifing?
should you be knifing?
should she be knifing?
should we be knifing?
should you be knifing?
should they be knifing? 	should I have knifed?
should you have knifed?
should she have knifed?
should we have knifed?
should you have knifed?
should they have knifed? 	should I have been knifing?
should you have been knifing?
should she have been knifing?
should we have been knifing?
should you have been knifing?
should they have been knifing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not knife?
should you not knife?
should she not knife?
should we not knife?
should you not knife?
should they not knife? 	should I not be knifing?
should you not be knifing?
should she not be knifing?
should we not be knifing?
should you not be knifing?
should they not be knifing? 	should I not have knifed?
should you not have knifed?
should she not have knifed?
should we not have knifed?
should you not have knifed?
should they not have knifed? 	should I not have been knifing?
should you not have been knifing?
should she not have been knifing?
should we not have been knifing?
should you not have been knifing?
should they not have been knifing?