could construct
Verbo regular: construct - constructed- constructed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could construct
you could construct
he could construct
we could construct
you could construct
they could construct 	I could be constructing
you could be constructing
he could be constructing
we could be constructing
you could be constructing
they could be constructing	I could have constructed
you could have constructed
he could have constructed
we could have constructed
you could have constructed
they could have constructed	I could have been constructing
you could have been constructing
he could have been constructing
we could have been constructing
you could have been constructing
they could have been constructing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't construct
you couldn't construct
he couldn't construct
we couldn't construct
you couldn't construct
they couldn't construct 	I couldn't be constructing
you couldn't be constructing
he couldn't be constructing
we couldn't be constructing
you couldn't be constructing
they couldn't be constructing	I couldn't have constructed
you couldn't have constructed
he couldn't have constructed
we couldn't have constructed
you couldn't have constructed
they couldn't have constructed	I couldn't have been constructing
you couldn't have been constructing
he couldn't have been constructing
we couldn't have been constructing
you couldn't have been constructing
they couldn't have been constructing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I construct?
could you construct?
could he construct?
could we construct?
could you construct?
could they construct? 	could I be constructing?
could you be constructing?
could he be constructing?
could we be constructing?
could you be constructing?
could they be constructing? 	could I have constructed?
could you have constructed?
could he have constructed?
could we have constructed?
could you have constructed?
could they have constructed? 	could I have been constructing?
could you have been constructing?
could he have been constructing?
could we have been constructing?
could you have been constructing?
could they have been constructing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I construct?
couldn't you construct?
couldn't he construct?
couldn't we construct?
couldn't you construct?
couldn't they construct? 	couldn't I be constructing?
couldn't you be constructing?
couldn't he be constructing?
couldn't we be constructing?
couldn't you be constructing?
couldn't they be constructing? 	couldn't I have constructed?
couldn't you have constructed?
couldn't he have constructed?
couldn't we have constructed?
couldn't you have constructed?
couldn't they have constructed? 	couldn't I have been constructing?
couldn't you have been constructing?
couldn't he have been constructing?
couldn't we have been constructing?
couldn't you have been constructing?
couldn't they have been constructing?