English verb conjugation
COULD PIGMENT

Regular verb: pigment - pigmented - pigmented

Affirmation

Simple form	V-ing form
I could pigment you could pigment he could pigment we could pigment you could pigment they could pigment	I could be pigmenting you could be pigmenting he could be pigmenting we could be pigmenting you could be pigmenting they could be pigmenting
Perfect	V-ing perfect
I could have pigmented you could have pigmented he could have pigmented we could have pigmented you could have pigmented they could have pigmented	I could have been pigmenting you could have been pigmenting he could have been pigmenting we could have been pigmenting you could have been pigmenting they could have been pigmenting

Negation

Simple form	V-ing form
I could not pigment you could not pigment he could not pigment we could not pigment you could not pigment they could not pigment	I could not be pigmenting you could not be pigmenting he could not be pigmenting we could not be pigmenting you could not be pigmenting they could not be pigmenting
Perfect	V-ing perfect
I could not have pigmented you could not have pigmented he could not have pigmented we could not have pigmented you could not have pigmented they could not have pigmented	I could not have been pigmenting you could not have been pigmenting he could not have been pigmenting we could not have been pigmenting you could not have been pigmenting they could not have been pigmenting

Interrogative form

Simple form	V-ing form
could I pigment? could you pigment? could he pigment? could we pigment? could you pigment? could they pigment?	could I be pigmenting? could you be pigmenting? could he be pigmenting? could we be pigmenting? could you be pigmenting? could they be pigmenting?
Perfect	V-ing perfect
could I have pigmented? could you have pigmented? could he have pigmented? could we have pigmented? could you have pigmented? could they have pigmented?	could I have been pigmenting? could you have been pigmenting? could he have been pigmenting? could we have been pigmenting? could you have been pigmenting? could they have been pigmenting?

Interro-negative form

Simple form	V-ing form
could I not pigment? could you not pigment? could he not pigment? could we not pigment? could you not pigment? could they not pigment?	could I not be pigmenting? could you not be pigmenting? could he not be pigmenting? could we not be pigmenting? could you not be pigmenting? could they not be pigmenting?
Perfect	V-ing perfect
could I not have pigmented? could you not have pigmented? could he not have pigmented? could we not have pigmented? could you not have pigmented? could they not have pigmented?	could I not have been pigmenting? could you not have been pigmenting? could he not have been pigmenting? could we not have been pigmenting? could you not have been pigmenting? could they not have been pigmenting?