English verb conjugation
COULD LIGNIFY

Regular verb: lignify - lignified - lignified

Affirmation

Simple form	V-ing form
I could lignify you could lignify she could lignify we could lignify you could lignify they could lignify	I could be lignifying you could be lignifying she could be lignifying we could be lignifying you could be lignifying they could be lignifying
Perfect	V-ing perfect
I could have lignified you could have lignified she could have lignified we could have lignified you could have lignified they could have lignified	I could have been lignifying you could have been lignifying she could have been lignifying we could have been lignifying you could have been lignifying they could have been lignifying

Negation

Simple form	V-ing form
I could not lignify you could not lignify she could not lignify we could not lignify you could not lignify they could not lignify	I could not be lignifying you could not be lignifying she could not be lignifying we could not be lignifying you could not be lignifying they could not be lignifying
Perfect	V-ing perfect
I could not have lignified you could not have lignified she could not have lignified we could not have lignified you could not have lignified they could not have lignified	I could not have been lignifying you could not have been lignifying she could not have been lignifying we could not have been lignifying you could not have been lignifying they could not have been lignifying

Interrogative form

Simple form	V-ing form
could I lignify? could you lignify? could she lignify? could we lignify? could you lignify? could they lignify?	could I be lignifying? could you be lignifying? could she be lignifying? could we be lignifying? could you be lignifying? could they be lignifying?
Perfect	V-ing perfect
could I have lignified? could you have lignified? could she have lignified? could we have lignified? could you have lignified? could they have lignified?	could I have been lignifying? could you have been lignifying? could she have been lignifying? could we have been lignifying? could you have been lignifying? could they have been lignifying?

Interro-negative form

Simple form	V-ing form
could I not lignify? could you not lignify? could she not lignify? could we not lignify? could you not lignify? could they not lignify?	could I not be lignifying? could you not be lignifying? could she not be lignifying? could we not be lignifying? could you not be lignifying? could they not be lignifying?
Perfect	V-ing perfect
could I not have lignified? could you not have lignified? could she not have lignified? could we not have lignified? could you not have lignified? could they not have lignified?	could I not have been lignifying? could you not have been lignifying? could she not have been lignifying? could we not have been lignifying? could you not have been lignifying? could they not have been lignifying?