ought to cow
Verbo regular: cow - cowed- cowed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought to cow
you ought to cow
he ought to cow
we ought to cow
you ought to cow
they ought to cow 	I ought to be cowing
you ought to be cowing
he ought to be cowing
we ought to be cowing
you ought to be cowing
they ought to be cowing	I ought to have cowed
you ought to have cowed
he ought to have cowed
we ought to have cowed
you ought to have cowed
they ought to have cowed	I ought to have been cowing
you ought to have been cowing
he ought to have been cowing
we ought to have been cowing
you ought to have been cowing
they ought to have been cowing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought not to cow
you ought not to cow
he ought not to cow
we ought not to cow
you ought not to cow
they ought not to cow 	I ought not to cowing
you ought not to cowing
he ought not to cowing
we ought not to cowing
you ought not to cowing
they ought not to cowing	I ought not to have cowed
you ought not to have cowed
he ought not to have cowed
we ought not to have cowed
you ought not to have cowed
they ought not to have cowed	I ought not to have been cowing
you ought not to have been cowing
he ought not to have been cowing
we ought not to have been cowing
you ought not to have been cowing
they ought not to have been cowing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
ought to I cow?
ought to you cow?
ought to he cow?
ought to we cow?
ought to you cow?
ought to they cow? 	ought to I be cowing?
ought to you be cowing?
ought to he be cowing?
ought to we be cowing?
ought to you be cowing?
ought to they be cowing? 	ought to I have cowed?
ought to you have cowed?
ought to he have cowed?
ought to we have cowed?
ought to you have cowed?
ought to they have cowed? 	ought to I have been cowing?
ought to you have been cowing?
ought to he have been cowing?
ought to we have been cowing?
ought to you have been cowing?
ought to they have been cowing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
ought I not to cow?
ought you not to cow?
ought he not to cow?
ought we not to cow?
ought you not to cow?
ought they not to cow? 	ought I not to be cowing?
ought you not to be cowing?
ought he not to be cowing?
ought we not to be cowing?
ought you not to be cowing?
ought they not to be cowing? 	ought I not to have cowed?
ought you not to have cowed?
ought he not to have cowed?
ought we not to have cowed?
ought you not to have cowed?
ought they not to have cowed? 	ought I not to have been cowing?
ought you not to have been cowing?
ought he not to have been cowing?
ought we not to have been cowing?
ought you not to have been cowing?
ought they not to have been cowing?