Conjugación del verbo inglés
COULD CONCRETE

Verbo regular: concrete - concreted - concreted

Afirmación

Forma simple	Forma con V-ing
I could concrete you could concrete she could concrete we could concrete you could concrete they could concrete	I could be concreting you could be concreting she could be concreting we could be concreting you could be concreting they could be concreting
Perfecto	Perfecto con V-ing
I could have concreted you could have concreted she could have concreted we could have concreted you could have concreted they could have concreted	I could have been concreting you could have been concreting she could have been concreting we could have been concreting you could have been concreting they could have been concreting

Negación

Forma simple	Forma con V-ing
I couldn't concrete you couldn't concrete she couldn't concrete we couldn't concrete you couldn't concrete they couldn't concrete	I couldn't be concreting you couldn't be concreting she couldn't be concreting we couldn't be concreting you couldn't be concreting they couldn't be concreting
Perfecto	Perfecto con V-ing
I couldn't have concreted you couldn't have concreted she couldn't have concreted we couldn't have concreted you couldn't have concreted they couldn't have concreted	I couldn't have been concreting you couldn't have been concreting she couldn't have been concreting we couldn't have been concreting you couldn't have been concreting they couldn't have been concreting

Forma interrogativa

Forma simple	Forma con V-ing
could I concrete? could you concrete? could she concrete? could we concrete? could you concrete? could they concrete?	could I be concreting? could you be concreting? could she be concreting? could we be concreting? could you be concreting? could they be concreting?
Perfecto	Perfecto con V-ing
could I have concreted? could you have concreted? could she have concreted? could we have concreted? could you have concreted? could they have concreted?	could I have been concreting? could you have been concreting? could she have been concreting? could we have been concreting? could you have been concreting? could they have been concreting?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I concrete? couldn't you concrete? couldn't she concrete? couldn't we concrete? couldn't you concrete? couldn't they concrete?	couldn't I be concreting? couldn't you be concreting? couldn't she be concreting? couldn't we be concreting? couldn't you be concreting? couldn't they be concreting?
Perfecto	Perfecto con V-ing
couldn't I have concreted? couldn't you have concreted? couldn't she have concreted? couldn't we have concreted? couldn't you have concreted? couldn't they have concreted?	couldn't I have been concreting? couldn't you have been concreting? couldn't she have been concreting? couldn't we have been concreting? couldn't you have been concreting? couldn't they have been concreting?