English verb conjugation
COULD LITHIFY

Regular verb: lithify - lithified - lithified

Affirmation

Simple form	V-ing form
I could lithify you could lithify he could lithify we could lithify you could lithify they could lithify	I could be lithifying you could be lithifying he could be lithifying we could be lithifying you could be lithifying they could be lithifying
Perfect	V-ing perfect
I could have lithified you could have lithified he could have lithified we could have lithified you could have lithified they could have lithified	I could have been lithifying you could have been lithifying he could have been lithifying we could have been lithifying you could have been lithifying they could have been lithifying

Negation

Simple form	V-ing form
I couldn't lithify you couldn't lithify he couldn't lithify we couldn't lithify you couldn't lithify they couldn't lithify	I couldn't be lithifying you couldn't be lithifying he couldn't be lithifying we couldn't be lithifying you couldn't be lithifying they couldn't be lithifying
Perfect	V-ing perfect
I couldn't have lithified you couldn't have lithified he couldn't have lithified we couldn't have lithified you couldn't have lithified they couldn't have lithified	I couldn't have been lithifying you couldn't have been lithifying he couldn't have been lithifying we couldn't have been lithifying you couldn't have been lithifying they couldn't have been lithifying

Interrogative form

Simple form	V-ing form
could I lithify? could you lithify? could he lithify? could we lithify? could you lithify? could they lithify?	could I be lithifying? could you be lithifying? could he be lithifying? could we be lithifying? could you be lithifying? could they be lithifying?
Perfect	V-ing perfect
could I have lithified? could you have lithified? could he have lithified? could we have lithified? could you have lithified? could they have lithified?	could I have been lithifying? could you have been lithifying? could he have been lithifying? could we have been lithifying? could you have been lithifying? could they have been lithifying?

Interro-negative form

Simple form	V-ing form
couldn't I lithify? couldn't you lithify? couldn't he lithify? couldn't we lithify? couldn't you lithify? couldn't they lithify?	couldn't I be lithifying? couldn't you be lithifying? couldn't he be lithifying? couldn't we be lithifying? couldn't you be lithifying? couldn't they be lithifying?
Perfect	V-ing perfect
couldn't I have lithified? couldn't you have lithified? couldn't he have lithified? couldn't we have lithified? couldn't you have lithified? couldn't they have lithified?	couldn't I have been lithifying? couldn't you have been lithifying? couldn't he have been lithifying? couldn't we have been lithifying? couldn't you have been lithifying? couldn't they have been lithifying?