could require
Verbo regular: require - required- required

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could require
you could require
he could require
we could require
you could require
they could require 	I could be requiring
you could be requiring
he could be requiring
we could be requiring
you could be requiring
they could be requiring	I could have required
you could have required
he could have required
we could have required
you could have required
they could have required	I could have been requiring
you could have been requiring
he could have been requiring
we could have been requiring
you could have been requiring
they could have been requiring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not require
you could not require
he could not require
we could not require
you could not require
they could not require 	I could not be requiring
you could not be requiring
he could not be requiring
we could not be requiring
you could not be requiring
they could not be requiring	I could not have required
you could not have required
he could not have required
we could not have required
you could not have required
they could not have required	I could not have been requiring
you could not have been requiring
he could not have been requiring
we could not have been requiring
you could not have been requiring
they could not have been requiring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I require?
could you require?
could he require?
could we require?
could you require?
could they require? 	could I be requiring?
could you be requiring?
could he be requiring?
could we be requiring?
could you be requiring?
could they be requiring? 	could I have required?
could you have required?
could he have required?
could we have required?
could you have required?
could they have required? 	could I have been requiring?
could you have been requiring?
could he have been requiring?
could we have been requiring?
could you have been requiring?
could they have been requiring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not require?
could you not require?
could he not require?
could we not require?
could you not require?
could they not require? 	could I not be requiring?
could you not be requiring?
could he not be requiring?
could we not be requiring?
could you not be requiring?
could they not be requiring? 	could I not have required?
could you not have required?
could he not have required?
could we not have required?
could you not have required?
could they not have required? 	could I not have been requiring?
could you not have been requiring?
could he not have been requiring?
could we not have been requiring?
could you not have been requiring?
could they not have been requiring?