English verb conjugation
COULD INTERLINEATE

Regular verb: interlineate - interlineated - interlineated

Affirmation

Simple form	V-ing form
I could interlineate you could interlineate she could interlineate we could interlineate you could interlineate they could interlineate	I could be interlineating you could be interlineating she could be interlineating we could be interlineating you could be interlineating they could be interlineating
Perfect	V-ing perfect
I could have interlineated you could have interlineated she could have interlineated we could have interlineated you could have interlineated they could have interlineated	I could have been interlineating you could have been interlineating she could have been interlineating we could have been interlineating you could have been interlineating they could have been interlineating

Negation

Simple form	V-ing form
I couldn't interlineate you couldn't interlineate she couldn't interlineate we couldn't interlineate you couldn't interlineate they couldn't interlineate	I couldn't be interlineating you couldn't be interlineating she couldn't be interlineating we couldn't be interlineating you couldn't be interlineating they couldn't be interlineating
Perfect	V-ing perfect
I couldn't have interlineated you couldn't have interlineated she couldn't have interlineated we couldn't have interlineated you couldn't have interlineated they couldn't have interlineated	I couldn't have been interlineating you couldn't have been interlineating she couldn't have been interlineating we couldn't have been interlineating you couldn't have been interlineating they couldn't have been interlineating

Interrogative form

Simple form	V-ing form
could I interlineate? could you interlineate? could she interlineate? could we interlineate? could you interlineate? could they interlineate?	could I be interlineating? could you be interlineating? could she be interlineating? could we be interlineating? could you be interlineating? could they be interlineating?
Perfect	V-ing perfect
could I have interlineated? could you have interlineated? could she have interlineated? could we have interlineated? could you have interlineated? could they have interlineated?	could I have been interlineating? could you have been interlineating? could she have been interlineating? could we have been interlineating? could you have been interlineating? could they have been interlineating?

Interro-negative form

Simple form	V-ing form
couldn't I interlineate? couldn't you interlineate? couldn't she interlineate? couldn't we interlineate? couldn't you interlineate? couldn't they interlineate?	couldn't I be interlineating? couldn't you be interlineating? couldn't she be interlineating? couldn't we be interlineating? couldn't you be interlineating? couldn't they be interlineating?
Perfect	V-ing perfect
couldn't I have interlineated? couldn't you have interlineated? couldn't she have interlineated? couldn't we have interlineated? couldn't you have interlineated? couldn't they have interlineated?	couldn't I have been interlineating? couldn't you have been interlineating? couldn't she have been interlineating? couldn't we have been interlineating? couldn't you have been interlineating? couldn't they have been interlineating?