ought to contribute
Verbo regular: contribute - contributed- contributed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought to contribute
you ought to contribute
he ought to contribute
we ought to contribute
you ought to contribute
they ought to contribute 	I ought to be contributing
you ought to be contributing
he ought to be contributing
we ought to be contributing
you ought to be contributing
they ought to be contributing	I ought to have contributed
you ought to have contributed
he ought to have contributed
we ought to have contributed
you ought to have contributed
they ought to have contributed	I ought to have been contributing
you ought to have been contributing
he ought to have been contributing
we ought to have been contributing
you ought to have been contributing
they ought to have been contributing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I oughtn't to contribute
you oughtn't to contribute
he oughtn't to contribute
we oughtn't to contribute
you oughtn't to contribute
they oughtn't to contribute 	I oughtn't to be contributing
you oughtn't to be contributing
he oughtn't to be contributing
we oughtn't to be contributing
you oughtn't to be contributing
they oughtn't to be contributing	I oughtn't to have contributed
you oughtn't to have contributed
he oughtn't to have contributed
we oughtn't to have contributed
you oughtn't to have contributed
they oughtn't to have contributed	I oughtn't to have been contributing
you oughtn't to have been contributing
he oughtn't to have been contributing
we oughtn't to have been contributing
you oughtn't to have been contributing
they oughtn't to have been contributing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
ought to I contribute?
ought to you contribute?
ought to he contribute?
ought to we contribute?
ought to you contribute?
ought to they contribute? 	ought to I be contributing?
ought to you be contributing?
ought to he be contributing?
ought to we be contributing?
ought to you be contributing?
ought to they be contributing? 	ought to I have contributed?
ought to you have contributed?
ought to he have contributed?
ought to we have contributed?
ought to you have contributed?
ought to they have contributed? 	ought to I have been contributing?
ought to you have been contributing?
ought to he have been contributing?
ought to we have been contributing?
ought to you have been contributing?
ought to they have been contributing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
oughtn't I to contribute?
oughtn't you to contribute?
oughtn't he to contribute?
oughtn't we to contribute?
oughtn't you to contribute?
oughtn't they to contribute? 	oughtn't I to be contributing?
oughtn't you to be contributing?
oughtn't he to be contributing?
oughtn't we to be contributing?
oughtn't you to be contributing?
oughtn't they to be contributing? 	oughtn't I to have contributed?
oughtn't you to have contributed?
oughtn't he to have contributed?
oughtn't we to have contributed?
oughtn't you to have contributed?
oughtn't they to have contributed? 	oughtn't I to have been contributing?
oughtn't you to have been contributing?
oughtn't he to have been contributing?
oughtn't we to have been contributing?
oughtn't you to have been contributing?
oughtn't they to have been contributing?