English verb conjugation
COULD CONVOLVE

Regular verb: convolve - convolved - convolved

Affirmation

Simple form	V-ing form
I could convolve you could convolve she could convolve we could convolve you could convolve they could convolve	I could be convolving you could be convolving she could be convolving we could be convolving you could be convolving they could be convolving
Perfect	V-ing perfect
I could have convolved you could have convolved she could have convolved we could have convolved you could have convolved they could have convolved	I could have been convolving you could have been convolving she could have been convolving we could have been convolving you could have been convolving they could have been convolving

Negation

Simple form	V-ing form
I couldn't convolve you couldn't convolve she couldn't convolve we couldn't convolve you couldn't convolve they couldn't convolve	I couldn't be convolving you couldn't be convolving she couldn't be convolving we couldn't be convolving you couldn't be convolving they couldn't be convolving
Perfect	V-ing perfect
I couldn't have convolved you couldn't have convolved she couldn't have convolved we couldn't have convolved you couldn't have convolved they couldn't have convolved	I couldn't have been convolving you couldn't have been convolving she couldn't have been convolving we couldn't have been convolving you couldn't have been convolving they couldn't have been convolving

Interrogative form

Simple form	V-ing form
could I convolve? could you convolve? could she convolve? could we convolve? could you convolve? could they convolve?	could I be convolving? could you be convolving? could she be convolving? could we be convolving? could you be convolving? could they be convolving?
Perfect	V-ing perfect
could I have convolved? could you have convolved? could she have convolved? could we have convolved? could you have convolved? could they have convolved?	could I have been convolving? could you have been convolving? could she have been convolving? could we have been convolving? could you have been convolving? could they have been convolving?

Interro-negative form

Simple form	V-ing form
couldn't I convolve? couldn't you convolve? couldn't she convolve? couldn't we convolve? couldn't you convolve? couldn't they convolve?	couldn't I be convolving? couldn't you be convolving? couldn't she be convolving? couldn't we be convolving? couldn't you be convolving? couldn't they be convolving?
Perfect	V-ing perfect
couldn't I have convolved? couldn't you have convolved? couldn't she have convolved? couldn't we have convolved? couldn't you have convolved? couldn't they have convolved?	couldn't I have been convolving? couldn't you have been convolving? couldn't she have been convolving? couldn't we have been convolving? couldn't you have been convolving? couldn't they have been convolving?