English verb conjugation
COULD LIGNIFY

Regular verb: lignify - lignified - lignified

Affirmation

Simple form	V-ing form
I could lignify you could lignify he could lignify we could lignify you could lignify they could lignify	I could be lignifying you could be lignifying he 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 he 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 he 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 he 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 he 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 he 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 he 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 he lignify? could we lignify? could you lignify? could they lignify?	could I be lignifying? could you be lignifying? could he 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 he 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 he 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 he 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 he 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 he 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 he not have been lignifying? could we not have been lignifying? could you not have been lignifying? could they not have been lignifying?