Conjugación del verbo inglés
COULD CONCRETIZE

Verbo regular: concretize - concretized - concretized

Afirmación

Forma simple	Forma con V-ing
I could concretize you could concretize she could concretize we could concretize you could concretize they could concretize	I could be concretizing you could be concretizing she could be concretizing we could be concretizing you could be concretizing they could be concretizing
Perfecto	Perfecto con V-ing
I could have concretized you could have concretized she could have concretized we could have concretized you could have concretized they could have concretized	I could have been concretizing you could have been concretizing she could have been concretizing we could have been concretizing you could have been concretizing they could have been concretizing

Negación

Forma simple	Forma con V-ing
I couldn't concretize you couldn't concretize she couldn't concretize we couldn't concretize you couldn't concretize they couldn't concretize	I couldn't be concretizing you couldn't be concretizing she couldn't be concretizing we couldn't be concretizing you couldn't be concretizing they couldn't be concretizing
Perfecto	Perfecto con V-ing
I couldn't have concretized you couldn't have concretized she couldn't have concretized we couldn't have concretized you couldn't have concretized they couldn't have concretized	I couldn't have been concretizing you couldn't have been concretizing she couldn't have been concretizing we couldn't have been concretizing you couldn't have been concretizing they couldn't have been concretizing

Forma interrogativa

Forma simple	Forma con V-ing
could I concretize? could you concretize? could she concretize? could we concretize? could you concretize? could they concretize?	could I be concretizing? could you be concretizing? could she be concretizing? could we be concretizing? could you be concretizing? could they be concretizing?
Perfecto	Perfecto con V-ing
could I have concretized? could you have concretized? could she have concretized? could we have concretized? could you have concretized? could they have concretized?	could I have been concretizing? could you have been concretizing? could she have been concretizing? could we have been concretizing? could you have been concretizing? could they have been concretizing?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I concretize? couldn't you concretize? couldn't she concretize? couldn't we concretize? couldn't you concretize? couldn't they concretize?	couldn't I be concretizing? couldn't you be concretizing? couldn't she be concretizing? couldn't we be concretizing? couldn't you be concretizing? couldn't they be concretizing?
Perfecto	Perfecto con V-ing
couldn't I have concretized? couldn't you have concretized? couldn't she have concretized? couldn't we have concretized? couldn't you have concretized? couldn't they have concretized?	couldn't I have been concretizing? couldn't you have been concretizing? couldn't she have been concretizing? couldn't we have been concretizing? couldn't you have been concretizing? couldn't they have been concretizing?