Conjugación del verbo inglés
COULD FORM

Verbo regular: form - formed - formed

Afirmación

Forma simple	Forma con V-ing
I could form you could form she could form we could form you could form they could form	I could be forming you could be forming she could be forming we could be forming you could be forming they could be forming
Perfecto	Perfecto con V-ing
I could have formed you could have formed she could have formed we could have formed you could have formed they could have formed	I could have been forming you could have been forming she could have been forming we could have been forming you could have been forming they could have been forming

Negación

Forma simple	Forma con V-ing
I couldn't form you couldn't form she couldn't form we couldn't form you couldn't form they couldn't form	I couldn't be forming you couldn't be forming she couldn't be forming we couldn't be forming you couldn't be forming they couldn't be forming
Perfecto	Perfecto con V-ing
I couldn't have formed you couldn't have formed she couldn't have formed we couldn't have formed you couldn't have formed they couldn't have formed	I couldn't have been forming you couldn't have been forming she couldn't have been forming we couldn't have been forming you couldn't have been forming they couldn't have been forming

Forma interrogativa

Forma simple	Forma con V-ing
could I form? could you form? could she form? could we form? could you form? could they form?	could I be forming? could you be forming? could she be forming? could we be forming? could you be forming? could they be forming?
Perfecto	Perfecto con V-ing
could I have formed? could you have formed? could she have formed? could we have formed? could you have formed? could they have formed?	could I have been forming? could you have been forming? could she have been forming? could we have been forming? could you have been forming? could they have been forming?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I form? couldn't you form? couldn't she form? couldn't we form? couldn't you form? couldn't they form?	couldn't I be forming? couldn't you be forming? couldn't she be forming? couldn't we be forming? couldn't you be forming? couldn't they be forming?
Perfecto	Perfecto con V-ing
couldn't I have formed? couldn't you have formed? couldn't she have formed? couldn't we have formed? couldn't you have formed? couldn't they have formed?	couldn't I have been forming? couldn't you have been forming? couldn't she have been forming? couldn't we have been forming? couldn't you have been forming? couldn't they have been forming?