English verb conjugation
COULD FORMALIZE

Regular verb: formalize - formalized - formalized

Affirmation

Simple form	V-ing form
I could formalize you could formalize she could formalize we could formalize you could formalize they could formalize	I could be formalizing you could be formalizing she could be formalizing we could be formalizing you could be formalizing they could be formalizing
Perfect	V-ing perfect
I could have formalized you could have formalized she could have formalized we could have formalized you could have formalized they could have formalized	I could have been formalizing you could have been formalizing she could have been formalizing we could have been formalizing you could have been formalizing they could have been formalizing

Negation

Simple form	V-ing form
I couldn't formalize you couldn't formalize she couldn't formalize we couldn't formalize you couldn't formalize they couldn't formalize	I couldn't be formalizing you couldn't be formalizing she couldn't be formalizing we couldn't be formalizing you couldn't be formalizing they couldn't be formalizing
Perfect	V-ing perfect
I couldn't have formalized you couldn't have formalized she couldn't have formalized we couldn't have formalized you couldn't have formalized they couldn't have formalized	I couldn't have been formalizing you couldn't have been formalizing she couldn't have been formalizing we couldn't have been formalizing you couldn't have been formalizing they couldn't have been formalizing

Interrogative form

Simple form	V-ing form
could I formalize? could you formalize? could she formalize? could we formalize? could you formalize? could they formalize?	could I be formalizing? could you be formalizing? could she be formalizing? could we be formalizing? could you be formalizing? could they be formalizing?
Perfect	V-ing perfect
could I have formalized? could you have formalized? could she have formalized? could we have formalized? could you have formalized? could they have formalized?	could I have been formalizing? could you have been formalizing? could she have been formalizing? could we have been formalizing? could you have been formalizing? could they have been formalizing?

Interro-negative form

Simple form	V-ing form
couldn't I formalize? couldn't you formalize? couldn't she formalize? couldn't we formalize? couldn't you formalize? couldn't they formalize?	couldn't I be formalizing? couldn't you be formalizing? couldn't she be formalizing? couldn't we be formalizing? couldn't you be formalizing? couldn't they be formalizing?
Perfect	V-ing perfect
couldn't I have formalized? couldn't you have formalized? couldn't she have formalized? couldn't we have formalized? couldn't you have formalized? couldn't they have formalized?	couldn't I have been formalizing? couldn't you have been formalizing? couldn't she have been formalizing? couldn't we have been formalizing? couldn't you have been formalizing? couldn't they have been formalizing?