English verb conjugation
COULD CALCIFY

Regular verb: calcify - calcified - calcified

Affirmation

Simple form	V-ing form
I could calcify you could calcify he could calcify we could calcify you could calcify they could calcify	I could be calcifying you could be calcifying he could be calcifying we could be calcifying you could be calcifying they could be calcifying
Perfect	V-ing perfect
I could have calcified you could have calcified he could have calcified we could have calcified you could have calcified they could have calcified	I could have been calcifying you could have been calcifying he could have been calcifying we could have been calcifying you could have been calcifying they could have been calcifying

Negation

Simple form	V-ing form
I couldn't calcify you couldn't calcify he couldn't calcify we couldn't calcify you couldn't calcify they couldn't calcify	I couldn't be calcifying you couldn't be calcifying he couldn't be calcifying we couldn't be calcifying you couldn't be calcifying they couldn't be calcifying
Perfect	V-ing perfect
I couldn't have calcified you couldn't have calcified he couldn't have calcified we couldn't have calcified you couldn't have calcified they couldn't have calcified	I couldn't have been calcifying you couldn't have been calcifying he couldn't have been calcifying we couldn't have been calcifying you couldn't have been calcifying they couldn't have been calcifying

Interrogative form

Simple form	V-ing form
could I calcify? could you calcify? could he calcify? could we calcify? could you calcify? could they calcify?	could I be calcifying? could you be calcifying? could he be calcifying? could we be calcifying? could you be calcifying? could they be calcifying?
Perfect	V-ing perfect
could I have calcified? could you have calcified? could he have calcified? could we have calcified? could you have calcified? could they have calcified?	could I have been calcifying? could you have been calcifying? could he have been calcifying? could we have been calcifying? could you have been calcifying? could they have been calcifying?

Interro-negative form

Simple form	V-ing form
couldn't I calcify? couldn't you calcify? couldn't he calcify? couldn't we calcify? couldn't you calcify? couldn't they calcify?	couldn't I be calcifying? couldn't you be calcifying? couldn't he be calcifying? couldn't we be calcifying? couldn't you be calcifying? couldn't they be calcifying?
Perfect	V-ing perfect
couldn't I have calcified? couldn't you have calcified? couldn't he have calcified? couldn't we have calcified? couldn't you have calcified? couldn't they have calcified?	couldn't I have been calcifying? couldn't you have been calcifying? couldn't he have been calcifying? couldn't we have been calcifying? couldn't you have been calcifying? couldn't they have been calcifying?