English verb conjugation
COULD THEORIZE

Regular verb: theorize - theorized - theorized

Affirmation

Simple form	V-ing form
I could theorize you could theorize she could theorize we could theorize you could theorize they could theorize	I could be theorizing you could be theorizing she could be theorizing we could be theorizing you could be theorizing they could be theorizing
Perfect	V-ing perfect
I could have theorized you could have theorized she could have theorized we could have theorized you could have theorized they could have theorized	I could have been theorizing you could have been theorizing she could have been theorizing we could have been theorizing you could have been theorizing they could have been theorizing

Negation

Simple form	V-ing form
I couldn't theorize you couldn't theorize she couldn't theorize we couldn't theorize you couldn't theorize they couldn't theorize	I couldn't be theorizing you couldn't be theorizing she couldn't be theorizing we couldn't be theorizing you couldn't be theorizing they couldn't be theorizing
Perfect	V-ing perfect
I couldn't have theorized you couldn't have theorized she couldn't have theorized we couldn't have theorized you couldn't have theorized they couldn't have theorized	I couldn't have been theorizing you couldn't have been theorizing she couldn't have been theorizing we couldn't have been theorizing you couldn't have been theorizing they couldn't have been theorizing

Interrogative form

Simple form	V-ing form
could I theorize? could you theorize? could she theorize? could we theorize? could you theorize? could they theorize?	could I be theorizing? could you be theorizing? could she be theorizing? could we be theorizing? could you be theorizing? could they be theorizing?
Perfect	V-ing perfect
could I have theorized? could you have theorized? could she have theorized? could we have theorized? could you have theorized? could they have theorized?	could I have been theorizing? could you have been theorizing? could she have been theorizing? could we have been theorizing? could you have been theorizing? could they have been theorizing?

Interro-negative form

Simple form	V-ing form
couldn't I theorize? couldn't you theorize? couldn't she theorize? couldn't we theorize? couldn't you theorize? couldn't they theorize?	couldn't I be theorizing? couldn't you be theorizing? couldn't she be theorizing? couldn't we be theorizing? couldn't you be theorizing? couldn't they be theorizing?
Perfect	V-ing perfect
couldn't I have theorized? couldn't you have theorized? couldn't she have theorized? couldn't we have theorized? couldn't you have theorized? couldn't they have theorized?	couldn't I have been theorizing? couldn't you have been theorizing? couldn't she have been theorizing? couldn't we have been theorizing? couldn't you have been theorizing? couldn't they have been theorizing?