English verb conjugation
COULD SCHEMATIZE

Regular verb: schematize - schematized - schematized

Affirmation

Simple form	V-ing form
I could schematize you could schematize she could schematize we could schematize you could schematize they could schematize	I could be schematizing you could be schematizing she could be schematizing we could be schematizing you could be schematizing they could be schematizing
Perfect	V-ing perfect
I could have schematized you could have schematized she could have schematized we could have schematized you could have schematized they could have schematized	I could have been schematizing you could have been schematizing she could have been schematizing we could have been schematizing you could have been schematizing they could have been schematizing

Negation

Simple form	V-ing form
I couldn't schematize you couldn't schematize she couldn't schematize we couldn't schematize you couldn't schematize they couldn't schematize	I couldn't be schematizing you couldn't be schematizing she couldn't be schematizing we couldn't be schematizing you couldn't be schematizing they couldn't be schematizing
Perfect	V-ing perfect
I couldn't have schematized you couldn't have schematized she couldn't have schematized we couldn't have schematized you couldn't have schematized they couldn't have schematized	I couldn't have been schematizing you couldn't have been schematizing she couldn't have been schematizing we couldn't have been schematizing you couldn't have been schematizing they couldn't have been schematizing

Interrogative form

Simple form	V-ing form
could I schematize? could you schematize? could she schematize? could we schematize? could you schematize? could they schematize?	could I be schematizing? could you be schematizing? could she be schematizing? could we be schematizing? could you be schematizing? could they be schematizing?
Perfect	V-ing perfect
could I have schematized? could you have schematized? could she have schematized? could we have schematized? could you have schematized? could they have schematized?	could I have been schematizing? could you have been schematizing? could she have been schematizing? could we have been schematizing? could you have been schematizing? could they have been schematizing?

Interro-negative form

Simple form	V-ing form
couldn't I schematize? couldn't you schematize? couldn't she schematize? couldn't we schematize? couldn't you schematize? couldn't they schematize?	couldn't I be schematizing? couldn't you be schematizing? couldn't she be schematizing? couldn't we be schematizing? couldn't you be schematizing? couldn't they be schematizing?
Perfect	V-ing perfect
couldn't I have schematized? couldn't you have schematized? couldn't she have schematized? couldn't we have schematized? couldn't you have schematized? couldn't they have schematized?	couldn't I have been schematizing? couldn't you have been schematizing? couldn't she have been schematizing? couldn't we have been schematizing? couldn't you have been schematizing? couldn't they have been schematizing?