English verb conjugation
COULD EXTERNALIZE

Regular verb: externalize - externalized - externalized

Affirmation

Simple form	V-ing form
I could externalize you could externalize she could externalize we could externalize you could externalize they could externalize	I could be externalizing you could be externalizing she could be externalizing we could be externalizing you could be externalizing they could be externalizing
Perfect	V-ing perfect
I could have externalized you could have externalized she could have externalized we could have externalized you could have externalized they could have externalized	I could have been externalizing you could have been externalizing she could have been externalizing we could have been externalizing you could have been externalizing they could have been externalizing

Negation

Simple form	V-ing form
I couldn't externalize you couldn't externalize she couldn't externalize we couldn't externalize you couldn't externalize they couldn't externalize	I couldn't be externalizing you couldn't be externalizing she couldn't be externalizing we couldn't be externalizing you couldn't be externalizing they couldn't be externalizing
Perfect	V-ing perfect
I couldn't have externalized you couldn't have externalized she couldn't have externalized we couldn't have externalized you couldn't have externalized they couldn't have externalized	I couldn't have been externalizing you couldn't have been externalizing she couldn't have been externalizing we couldn't have been externalizing you couldn't have been externalizing they couldn't have been externalizing

Interrogative form

Simple form	V-ing form
could I externalize? could you externalize? could she externalize? could we externalize? could you externalize? could they externalize?	could I be externalizing? could you be externalizing? could she be externalizing? could we be externalizing? could you be externalizing? could they be externalizing?
Perfect	V-ing perfect
could I have externalized? could you have externalized? could she have externalized? could we have externalized? could you have externalized? could they have externalized?	could I have been externalizing? could you have been externalizing? could she have been externalizing? could we have been externalizing? could you have been externalizing? could they have been externalizing?

Interro-negative form

Simple form	V-ing form
couldn't I externalize? couldn't you externalize? couldn't she externalize? couldn't we externalize? couldn't you externalize? couldn't they externalize?	couldn't I be externalizing? couldn't you be externalizing? couldn't she be externalizing? couldn't we be externalizing? couldn't you be externalizing? couldn't they be externalizing?
Perfect	V-ing perfect
couldn't I have externalized? couldn't you have externalized? couldn't she have externalized? couldn't we have externalized? couldn't you have externalized? couldn't they have externalized?	couldn't I have been externalizing? couldn't you have been externalizing? couldn't she have been externalizing? couldn't we have been externalizing? couldn't you have been externalizing? couldn't they have been externalizing?